If you’re looking to brighten your days during winter, I recommend checking out the top 15 sad lamps with 10,000 Lux brightness, adjustable features, and safe, UV-free light. These lamps include models with remote controls, timers, and customizable brightness levels to suit your needs. They’re portable and stylish too, making it easy to use at home or work. If you’d like, I can guide you through each option to find the best fit for you.
Key Takeaways
- Look for lamps emitting 10,000 Lux full-spectrum LED light for maximum effectiveness against winter blues.
- Prioritize UV-free, flicker-free designs with adjustable brightness and color temperature for personalized therapy.
- Check for safety certifications like UL, CE, or FCC to ensure reliable, safe use.
- Consider portability features such as compact size, wall mounts, or USB power for versatile placement.
- Choose models with timers, multiple modes, and user-friendly controls to optimize daily light therapy routines.
Light Therapy Lamp with 10,000 Lux and Remote Control
If you’re looking to beat the winter blues, this light therapy lamp with 10,000 Lux is a game-changer. It mimics natural sunlight, helping to lift your mood, regulate your sleep, and ease jet lag. With full spectrum light and three adjustable color temperatures, you can customize the brightness and tone to suit your needs. The sleek design features a charming 3D moon pattern, adding an aesthetic touch to any space. Plus, it’s easy to control via touch or remote, allowing you to set timers and fine-tune settings effortlessly. It’s perfect for both home and office, promoting well-being while blending into your decor.
Best For: individuals seeking to improve mood, sleep, or productivity through customizable light therapy in home or office settings.
Pros:
- Mimics natural sunlight with 10,000 Lux to alleviate winter blues and regulate circadian rhythms.
- Fully adjustable with 3 color temperatures, 4 brightness levels, touch and remote controls for personalized use.
- Stylish 3D moon design adds aesthetic appeal while serving as a versatile lamp for relaxation or focus.
Cons:
- May be more expensive than standard lamps due to its advanced features and design.
- Requires access to power outlets and may need adjustment for optimal positioning.
- Some users might find the multiple settings and controls slightly complex initially.
Fitfirst Light Lamp with Adjustable Brightness and Timer
The Fitfirst Light Lamp’s adjustable brightness levels and timer make it an excellent choice for anyone seeking customizable light therapy to combat winter blues. With up to 15,000 lux and multiple brightness settings, I can tailor the light intensity to my needs, whether I want a gentle boost or a more vibrant glow. The built-in timer offers flexibility, allowing me to set sessions from 15 to 60 minutes or keep the light on continuously. Its sleek, portable design means I can use it at home, in the office, or even while traveling. This combination of features makes it easy to incorporate effective, safe light therapy into my daily routine.
Best For: individuals seeking customizable, safe, and portable light therapy to combat seasonal affective disorder or improve mood and energy levels.
Pros:
- Adjustable brightness levels up to 15,000 lux for personalized light intensity
- Multiple timer options including 15, 30, 45, 60 minutes, and continuous use
- Compact and lightweight design ideal for home, office, or travel use
Cons:
- May require multiple sessions for optimal results, which could be time-consuming
- The need to avoid direct eye contact during use for safety reasons
- Limited color temperature options may not suit all preferences or specific needs
Light Therapy Lamp with Blue Light and Timer
A light therapy lamp with blue light and a timer is an excellent choice for anyone looking to boost energy and mood during the darker months. I love how the SMY Blue Light Energy Lamp features adjustable LED blue light that mimics a bright, sunny sky, providing the same effective light as a 10,000 lux white lamp. Its modern, portable design fits easily on desks or nightstands, making it perfect for home or travel. With two brightness levels and a built-in timer, I can customize my sessions for safety and comfort. Just 20-30 minutes a day helps combat fatigue, improve alertness, and lift my spirits during winter.
Best For: individuals seeking an effective, portable light therapy solution to combat seasonal affective disorder, boost energy, and improve mood during darker months or insufficient natural light conditions.
Pros:
- Mimics natural sunlight with a bright, blue light equivalent to 10,000 lux for effective therapy
- Adjustable brightness levels and timer options for personalized, safe use
- Compact, modern design perfect for home, office, or travel environments
Cons:
- Requires daily use of 20-30 minutes for noticeable benefits, which may be inconvenient for some
- Blue light therapy may not be suitable for individuals sensitive to blue light or with certain eye conditions
- Does not include additional features such as color therapy or sound options
Wobrikosee Light Therapy Lamp, UV-Free 10000 Lux with Timer and Adjustable Brightness
Designed for anyone seeking a portable and customizable light therapy solution, the Wobrikosee Light Therapy Lamp offers four adjustable brightness levels and two lighting modes. Its ultra-thin, sleek design makes it easy to carry and position, whether at home, work, or on the go. The lamp features a 90° rotatable stand for flexible placement and a long cord for versatile setup. It mimics full spectrum sunlight with soft, UV-free light at 10,000 lux, promoting mood and energy without harming your eyes or skin. With touch controls and four timer options, it provides a personalized, convenient way to combat winter blues effectively.
Best For: individuals seeking a portable, customizable light therapy solution to improve mood, energy, and sleep, whether at home, work, or travel.
Pros:
- Ultra-thin, sleek, and portable design for easy transportation and versatile placement
- Adjustable brightness levels and lighting modes for personalized therapy sessions
- UV-free 10,000 lux full spectrum sunlight simulation, safe for eyes and skin
Cons:
- Limited to four preset timer options, which may not suit all users’ needs
- Requires manual touch controls that may be less responsive for some users
- The long cord may be cumbersome in very tight or cluttered spaces
Verilux HappyLight Lucent Light Therapy Lamp
If you’re looking for an easy and effective way to boost your mood during the darker months, the Verilux HappyLight Lucent is an excellent choice, especially if you want a portable, user-friendly solution. It offers up to 10,000 lux of UV-free, full-spectrum LED light, mimicking natural sunlight safely. Its ultra-thin, tablet-style design with a detachable stand makes it easy to use at home, in the office, or while traveling. With just one-button operation, it’s simple to activate. The light quality is flicker-free and glare-free, ensuring a comfortable experience. Verilux’s trusted support and a 3-year warranty make this lamp a reliable and convenient option for seasonal mood support.
Best For: individuals seeking an easy-to-use, portable light therapy solution to boost mood, energy, and sleep during darker months or sunlight deprivation.
Pros:
- Offers up to 10,000 lux of UV-free, full-spectrum LED light for natural sunlight simulation
- Ultra-thin, tablet-style design with a detachable stand for versatile placement and portability
- Simple one-button operation for effortless daily use and quick activation
Cons:
- Limited to basic on/off function without adjustable brightness or timer settings
- May not be as effective for severe cases of seasonal affective disorder compared to larger or more advanced units
- Requires consistent daily use for optimal benefits, which might be inconvenient for some users
Light Therapy Lamp with Remote and USB Ports
The Light Therapy Lamp with Remote and USB Ports is an excellent choice for those who want personalized control and versatile functionality in one device. With its remote control, I can easily adjust brightness and color temperature without getting up, making it super convenient. The lamp offers three color settings—warm, neutral, and cool white—so I can customize the light for relaxation, focus, or daily use. Plus, the built-in USB ports let me charge my phone or tablet while using the lamp, saving space and time. Its sleek design suits any decor, and it meets safety standards, ensuring a safe, effective light therapy experience.
Best For: individuals seeking customizable light therapy with convenient remote control and charging options for home or office use.
Pros:
- Adjustable color temperatures and brightness levels for personalized light therapy.
- Remote control allows easy adjustments without physical contact.
- Built-in USB ports enable charging devices simultaneously, saving space.
Cons:
- Might be more expensive than basic lamps without remote or USB features.
- Requires an electrical outlet, limiting portability for travel.
- The size may be less compact for small spaces or minimalist setups.
UV-Free 10000 Lux Daylight Lamp with Touch Control
The UV-Free 10,000 Lux Daylight Lamp with Touch Control is ideal for anyone seeking a portable and customizable light therapy solution. Its sleek, compact design makes it easy to carry and place anywhere—home, office, or travel. The large surface delivers natural sunlight intensity safely without UV rays, helping combat winter blues, jet lag, and fatigue. With touch controls, you can effortlessly adjust brightness levels and set timers from 15 to 60 minutes, tailoring your experience. Its rotatable stand offers flexible positioning, ensuring ideal light exposure. Overall, this lamp combines convenience, versatility, and effective therapy in a lightweight package.
Best For: individuals seeking a portable, customizable light therapy solution to improve mood, energy, and focus in home, office, or travel settings.
Pros:
- Compact, lightweight, and portable design for easy use anywhere
- Adjustable brightness levels and timers for personalized therapy sessions
- UV-free, safe, and natural sunlight simulation to combat seasonal affective disorder and fatigue
Cons:
- Limited to a maximum of 60 minutes per session, which may not suit all users’ needs
- Requires direct exposure for effective results, which may be inconvenient in some environments
- May not provide the same intensity as larger, professional light therapy units
Verilux HappyLight Luxe Light Therapy Lamp
For anyone seeking a customizable and comfortable light therapy solution, the Verilux HappyLight Luxe stands out with its adjustable brightness levels, color temperature settings, and programmable timer. It delivers up to 10,000 Lux of UV-free, full-spectrum LED light, providing safe, effective therapy that mimics natural sunlight. Its glare-free design ensures a gentle experience, while the adjustable settings let you personalize your routine. The device’s slim, portable design with a detachable stand and wall mount makes it versatile for home or travel use. Whether battling winter blues, improving sleep, or boosting energy, the HappyLight Luxe adapts seamlessly to your lifestyle.
Best For: individuals seeking a customizable, portable light therapy solution to improve mood, sleep, or energy levels, especially during seasonal changes or in environments with limited natural sunlight.
Pros:
- Adjustable brightness, color temperature, and programmable timer for personalized therapy sessions
- UV-free, full-spectrum LED light providing up to 10,000 Lux for safe and effective treatment
- Compact, slim design with detachable stand and wall mount for versatile use at home or on the go
Cons:
- May require multiple adjustments to find optimal settings for each user
- Higher price point compared to basic light therapy lamps
- Requires power source, limiting use in completely off-grid situations
SUXIO Light Therapy Lamp, 10000 Lux, Touch Control, Portable Mood Light
If you’re looking for a portable solution to lift your mood during the darker months, the SUXIO Light Therapy Lamp delivers 10,000 Lux of bright, natural light that mimics sunlight. Its adjustable modes offer 4,000, 7,000, and 10,000 Lux, allowing you to customize brightness based on your needs. The touch control makes it easy to switch settings, while the timer options—30, 60, or 90 minutes—help tailor your sessions. Its ultra-slim, portable design includes a USB power supply and adjustable stand, making it perfect for home, office, or travel. Plus, flicker-free LEDs ensure safe, glare-free light therapy.
Best For: individuals seeking a portable, customizable light therapy solution to improve mood, focus, and energy during darker months or in indoor environments.
Pros:
- Provides 10,000 Lux brightness to mimic natural sunlight effectively.
- Adjustable modes and timer options allow personalized therapy sessions.
- Compact, portable design with USB power makes it convenient for travel and varied settings.
Cons:
- Requires a 5V-2A USB power adapter; using lower power may cause malfunctions.
- Limited to specific brightness levels without additional adjustable features.
- May need careful positioning to ensure optimal light exposure and effectiveness.
Light Therapy Lamp with 10,000 Lux, 3 Color Temperatures & 5 Brightness Levels
A light therapy lamp with 10,000 lux brightness and customizable settings is an excellent choice for anyone battling winter blues or seasonal affective disorder. It offers stable, flicker-free light with a gentle linen shade that reduces glare. You can easily personalize your experience with three color temperatures—warm, neutral, and cool—and five brightness levels, all adjustable via touch control. Its modern design seamlessly fits into any space, from living rooms to offices. This lamp provides a safe, non-invasive way to boost your energy and mood daily, making it an effective tool during darker months or for circadian rhythm adjustments.
Best For: individuals experiencing winter blues, seasonal affective disorder, or needing a customizable light environment for mood and energy enhancement.
Pros:
- Provides bright, stable, flicker-free light with 10,000 lux for effective therapy.
- Offers customizable settings with three color temperatures and five brightness levels for personalized use.
- Modern, minimalist design that easily integrates into various home and office decor.
Cons:
- May be too bright or intense for individuals with light sensitivity or visual discomfort.
- Requires a power source and table space, which might be limited in small environments.
- Adjusting multiple settings could be cumbersome for users seeking quick, simple operation.
Homedics Light Therapy Lamp with Adjustable Color and Timer
The Homedics Light Therapy Lamp stands out with its adjustable color temperature and customizable timer, making it an excellent choice for anyone seeking personalized relief from winter blues. Its 10,000 Lux full spectrum LEDs mimic natural light, are UV-free, and safe for eyes and skin. The adjustable color temperature helps align the light with your body’s natural rhythms, enhancing comfort. Plus, with six built-in timer options, you can easily customize session durations. Compact and stylish, it fits seamlessly into any space—whether on your desk, bedside table, or kitchen. Easy to operate, it’s perfect for tailoring light therapy to your daily routine and needs.
Best For: individuals seeking personalized, safe, and effective light therapy to combat winter depression, improve mood, and enhance overall well-being in various settings.
Pros:
- Customizable light therapy sessions with adjustable color temperature and multiple timer options
- Full spectrum 10,000 Lux LEDs that mimic natural light and are UV-free, safe for eyes and skin
- Compact and stylish design that easily fits into home or office environments
Cons:
- May require consistent daily use to see significant mood and energy improvements
- Limited to indoor use; not suitable for outdoor light therapy needs
- The adjustable features might be complex for some users to operate initially
Light Therapy Lamp with 10,000 Lux, UV-Free, Adjustable Brightness & Timer
This light therapy lamp is ideal for anyone looking to boost their mood and energy levels during the darker winter months, thanks to its powerful 10,000 lux full-spectrum LED that mimics natural sunlight. Its UV-free design guarantees safe use for eyes and skin, providing gentle, effective illumination. The adjustable brightness levels (25%, 50%, 70%, 100%) and three color temperatures (2700K-6000K) let me customize the light to my preferences. I appreciate the 1-hour timer and simple touch controls, which make it easy to set up and use daily. The wood grain finish adds a warm touch, making it a stylish addition to any room.
Best For: individuals seeking a safe, customizable light therapy solution to improve mood and energy during the winter months or in low-light environments.
Pros:
- Emits 10,000 lux full-spectrum LED light that mimics natural sunlight for effective therapy
- UV-free design ensures safety for eyes and skin during prolonged use
- Adjustable brightness levels and color temperatures allow personalized comfort and preferences
Cons:
- The 11.8-inch size may be less suitable for small spaces or desk use for some users
- Limited to a 1-hour timer, which might require manual adjustments for longer sessions
- Requires an electrical outlet and adapter, reducing portability compared to battery-powered options
Circadian Optics Lumos 2.0 Bright Light Therapy Desk Lamp
If you’re looking for a stylish, highly adjustable lamp that fits neatly on your desk while delivering effective light therapy, the Circadian Optics Lumos 2.0 is an excellent choice. Its bold, modern design and unique folding mechanism make it stand out, and it occupies minimal desk space. Equipped with 10,000 Lux of full-spectrum light at 5500K, it mimics natural noon-day sun, boosting mood, energy, and sleep regulation. The LEDs last up to 50,000 hours, are UV-free, and provide consistent illumination. Backed by nearly a decade of research and a 4-year warranty, it combines aesthetic appeal with reliable performance.
Best For: individuals seeking a stylish, highly adjustable desk lamp that provides effective, full-spectrum light therapy to boost mood, energy, and sleep regulation.
Pros:
- Modern, bold design with a unique folding mechanism for easy adjustability
- Compact, minimal desk space footprint with stable, weighted base
- Long-lasting LEDs with 50,000-hour lifespan and UV-free illumination
Cons:
- May be more expensive than basic desk lamps without light therapy features
- Requires power source, limiting placement options away from outlets
- Some users might find the full-spectrum light intensity too bright for close-up use
Premium Blue Light Therapy Glasses for Sleep and Energy
Looking for an effective way to boost your energy and improve sleep during the darker months? I recommend premium blue light therapy glasses. These portable, lightweight devices use blue-turquoise light to regulate your circadian rhythms, naturally enhancing mood, energy, and sleep quality without pills or caffeine. They’re comfortable to wear, even with glasses, and fit snugly thanks to adjustable nosepieces. Clinically proven and certified safe, they reset your body clock, helping you wake refreshed and fall asleep easier. Plus, you can wear them at home, work, or on the go, making them a versatile tool for combating winter blues and maintaining wellness.
Best For: individuals seeking a natural, drug-free solution to improve sleep quality, boost energy, and combat seasonal affective disorder during darker months or shift work.
Pros:
- Clinically proven to enhance sleep, mood, and energy levels without medication or caffeine.
- Portable and lightweight, suitable for use at home, in the office, or while traveling.
- Comfortable wearable design compatible with glasses and adjustable for a perfect fit.
Cons:
- Requires use of the AYO app (additional fee) for optimal guidance, which may not be suitable for all users.
- Effectiveness may vary depending on individual circadian rhythm disruptions and usage consistency.
- Some users might find the initial adjustment period or wearing the device during activities challenging.
Light Therapy Lamp with Remote, 10,000 Lux, Full Spectrum Daylight, Adjustable Brightness and Timer
The Light Therapy Lamp with Remote, 10,000 Lux, Full Spectrum Daylight is an excellent choice for anyone seeking customizable relief from winter blues, jet lag, or seasonal affective disorder. With 469 UV-free LEDs, it mimics natural sunlight to boost mood, energy, and sleep quality. Its dual-base design allows for versatile placement on a table or floor, with adjustable height and a 360° illumination angle. You can easily control brightness, color temperature, and timer settings remotely or via touch. This lamp provides safe, effective light therapy tailored to your needs, making it ideal for home or office use during darker months.
Best For: individuals seeking customizable, safe, and effective light therapy to improve mood, energy, sleep, and alleviate seasonal affective disorder or winter blues at home or in the office.
Pros:
- Fully customizable settings with remote control, including brightness, color temperature, and timer options for tailored therapy sessions
- Full spectrum, UV-free LED light that mimics natural sunlight, promoting safety and effectiveness
- Versatile dual-base design allows for both floor-standing and tabletop placement with adjustable height and 360° illumination
Cons:
- Requires assembly and is not water-resistant, limiting outdoor or damp environment use
- Weighs 7.5 pounds, which may be less portable for frequent movement or travel
- Limited to indoor use with a fixed power output of 24W, potentially restricting brightness in very large spaces
Factors to Consider When Choosing a Sad Lamp for Winter Blues (Light Therapy)
When choosing a sad lamp, I consider a few key factors to ensure it meets my needs. Things like brightness levels, adjustable color settings, and timers are vital for effective therapy. I also pay attention to design, portability, and the quality of the light spectrum to get the most benefit.
Brightness Levels Needed
Choosing the right brightness level is essential for effective light therapy, especially since different individuals and symptoms require varying intensities. For treating winter blues, around 10,000 Lux is generally recommended, as it mimics natural sunlight and helps regulate your mood and circadian rhythms. Lower levels, like 2,500 to 5,000 Lux, can work for mild symptoms or shorter sessions but might be less effective overall. Some lamps offer adjustable brightness, which is helpful for customizing therapy to your comfort, reducing glare, and accommodating different times of day. For most people with seasonal affective disorder, 20-30 minutes of exposure to 10,000 Lux daily yields noticeable improvement. Ensuring the lamp provides sufficient brightness is key to maximizing the benefits of your light therapy.
Adjustable Color Settings
Adjustable color settings can make a significant difference in how comfortable and effective your light therapy sessions are. They let me customize the light spectrum to suit my mood and needs, choosing from warm, neutral, or cool white light. Changing color temperatures helps mimic different times of day, boosting circadian rhythm regulation. I find that adjustable colors also reduce glare and eye strain, making longer sessions more comfortable. Fine-tuning the color temperature can enhance mood and alertness, whether I want a cozy atmosphere or an energizing boost. These settings give me the flexibility to adapt my lamp for different activities, like relaxing or focusing. Overall, having control over color options guarantees a more personalized, effective, and comfortable light therapy experience.
Timer and Auto Shutoff
A timer function is a handy feature that helps me manage my light therapy sessions effectively. It lets me set specific durations, usually between 15 and 60 minutes, so I get the right amount of exposure without overdoing it. The auto shutoff feature is equally important because it automatically turns off the lamp once the session ends, preventing overexposure and reducing eye strain. I appreciate adjustable timers because I can customize sessions based on my schedule and needs, making it easier to stay consistent. Some lamps even have memory functions that recall my last setting, saving time. Using timers and auto shutoff features guarantees I get safe, effective therapy while minimizing risks associated with prolonged light exposure.
Design and Portability
When selecting a sad lamp for winter blues, I find that a compact and lightweight design makes it much easier to carry and set up in different spaces. This portability is essential if you want to use it in multiple rooms or take it with you on trips. Adjustable stands or rotatable bases add flexibility, allowing you to position the light exactly where it’s most effective. Sleek, modern aesthetics help the lamp blend seamlessly into your home or office decor, so it doesn’t stand out unnecessarily. Foldable or collapsible features improve storage and make transport more convenient. Built-in handles or carrying cases further simplify movement, especially for those who want a versatile lamp that’s easy to pack and set up wherever needed.
Light Spectrum Quality
Choosing a sad lamp with the right light spectrum is key to making your therapy effective. I look for lamps that emit full-spectrum light, closely mimicking natural sunlight, which provides the most benefit. A color temperature around 5000K to 6500K is ideal because it resembles midday sunlight and helps regulate my circadian rhythm. Brightness is also essential—I aim for at least 10,000 lux, as anything less may not alleviate winter blues effectively. I steer clear of lamps that flicker or have hotspots because inconsistent light can cause eye strain and reduce therapy benefits. Finally, I prefer lamps with UV-free LED technology, ensuring safe exposure without risking skin or eye damage. These factors help maximize the effectiveness and safety of my light therapy sessions.
Safety Certifications
Ensuring your sad lamp has proper safety certifications is essential for safe and effective light therapy. Certifications like UL, CE, or FCC verify that the device meets strict electrical safety standards, reducing risks of malfunction or hazards. Certified lamps are tested for flicker-free operation and UV-free light emission, which helps prevent eye strain and skin exposure issues during prolonged use. These certifications also indicate the lamp complies with international safety and quality standards for medical or therapeutic devices, giving you peace of mind. By choosing a certified sad lamp, you minimize potential health risks and guarantee the device’s brightness and spectrum are safe for daily use. Ultimately, safety certifications are key to a reliable, effective, and worry-free light therapy experience.
Frequently Asked Questions
How Effective Are Sad Lamps for Treating Seasonal Affective Disorder?
Sad lamps are quite effective for treating seasonal affective disorder. I’ve personally experienced a noticeable improvement in my mood and energy levels after using one regularly. The bright light mimics natural sunlight, helping regulate my circadian rhythm and boost serotonin. While results vary individually, many people find that consistent use during darker months considerably alleviates their winter blues, making daily life brighter and more manageable.
Can Light Therapy Lamps Be Used Alongside Medication or Therapy?
Think of light therapy lamps as a supportive dance partner—they complement medication or therapy perfectly. I use mine alongside other treatments without issues, and many find it enhances their mood and energy levels. It’s safe to combine, but I recommend chatting with your healthcare provider first to ensure it fits your specific needs. Together, they create a brighter, more balanced path through the winter months.
What Safety Precautions Should I Follow Using a Sad Lamp?
You should always follow the manufacturer’s guidelines when using a sad lamp. I make sure to start with shorter sessions, usually 20 minutes, and avoid looking directly into the light. I also keep the lamp at the recommended distance—about 16 to 24 inches—and use it in the morning to prevent sleep disruptions. If I experience headaches or eye strain, I stop and consult my healthcare provider.
How Long and How Often Should I Use a Sad Lamp Daily?
I recommend using a sad lamp for about 20 to 30 minutes each morning. I usually start with 20 minutes and adjust based on how I feel. I make sure to sit at the correct distance, usually about 16 to 24 inches away, and avoid looking directly into the light. Consistency is key, so I try to use it daily during the darker months for the best results.
Are There Any Side Effects From Using Light Therapy Lamps?
Think of light therapy like a gentle morning sun—generally safe, but not without potential side effects. I’ve found some folks experience eye strain, headaches, or mild nausea if they use it too long or too close. That’s why I recommend starting with shorter sessions and consulting a healthcare professional if you notice discomfort. Like any tool, it’s best used thoughtfully to maximize benefits and minimize risks.
Conclusion
Did you know that about 15% of people experience Seasonal Affective Disorder? Luckily, a good sad lamp can make a real difference. By choosing the right one, you can boost your mood and energy during those gloomy winter months. Remember to weigh features like brightness, timers, and blue light options. Don’t let winter blues control your life—brighten your days and feel more like yourself with the perfect light therapy lamp.
