Frequently Asked Questions

Blue light (450-495nm wavelength) powerfully suppresses melatonin, the hormone your body produces to prepare for sleep. Research from Harvard Medical School found that blue light suppresses melatonin for twice as long as other light wavelengths and shifts your circadian rhythm by up to 3 hours. This disruption has been linked to difficulty falling asleep, poor sleep quality, and long-term health effects including increased risk of depression, diabetes, and cardiovascular problems.

Most LED lights flicker—turning on and off hundreds of times per second—due to how manufacturers control brightness. While often imperceptible consciously, your nervous system still responds to this flicker. Studies show it can cause eye strain, headaches, fatigue, and difficulty concentrating. A 2024 study found that 41% of migraine sufferers developed headaches after exposure to common LED flicker patterns, compared to just 8% of control subjects. Our products use constant-current drivers that eliminate flicker entirely.

Amber light (~590nm) and red light (~630-700nm) have longer wavelengths that don't interfere with melatonin production. A 2024 study comparing red and blue light exposure found that after two hours, blue light maintained melatonin suppression while red light allowed levels to recover naturally. By using amber or red spectrum lighting in the evening, you can maintain functional illumination while allowing your body to prepare for sleep naturally.

Yes, extensively. The effects of light wavelength on circadian rhythm and melatonin production have been studied for decades. Key research includes studies from Harvard Medical School, the Journal of Applied Physiology, and systematic reviews published in the National Library of Medicine. We link to primary research sources on our About page. While individual results vary based on overall sleep hygiene, the underlying science is well-established.

Amber light (~590nm) provides a warm, golden glow similar to candlelight. It's bright enough for reading, cooking, and general activities while being completely free of blue light. Red light (~630nm) is even less stimulating to your circadian system and is ideal for the final hour before bed, nighttime bathroom visits, or for use as a night light. Many customers use amber lights for their evening routine and red lights closer to bedtime.

Yes, all ilumina products use advanced constant-current LED drivers that eliminate flicker entirely. Unlike conventional LEDs that may flicker at 100-120Hz (or even higher frequencies that can still affect sensitive individuals), our lights produce steady, stable illumination. This makes them suitable for extended use without causing eye strain or headaches.

Our amber lights are designed to be functional for everyday evening activities including reading, cooking, and relaxing. While they won't be as bright as conventional white LEDs (which would defeat the purpose), they provide comfortable illumination similar to traditional incandescent bulbs or candlelight. Red lights are dimmer by design, intended for the period immediately before sleep.

Our glasses block 100% of blue light wavelengths (up to 500nm), which is more comprehensive than most computer glasses that only filter a small percentage. They're ideal for situations where you can't control the lighting—watching TV, using devices, or in environments with conventional LED lighting. The glasses can be worn over prescription eyewear or on their own.

We ship worldwide from our European distribution center. Typical delivery times: Europe (Germany, France, UK, etc.): 3-7 business days. Brazil: 10-15 business days. USA & Canada: 7-12 business days. Other regions: 14-21 business days. You'll receive tracking information once your order ships.

We offer a 30-day satisfaction guarantee. If you're not completely happy with your purchase, contact us for a full refund or exchange—no questions asked. We want you to experience the benefits of healthy lighting risk-free. Simply return the product in its original packaging within 30 days of delivery.

Yes, all ilumina products come with a 2-year manufacturer warranty covering defects in materials and workmanship. Our LED technology is rated for 25,000+ hours of use. If you experience any issues, contact our support team and we'll arrange a replacement.

For optimal results, switch to amber or red lighting 2-3 hours before your intended bedtime. This gives your body time to naturally increase melatonin production. However, even using them for just the final hour before bed can make a noticeable difference. Many customers also find our products helpful for middle-of-the-night use, such as bathroom visits, without disrupting their sleep.

Yes, our products are safe for all ages. In fact, children may benefit even more than adults, as research shows their eyes transmit more blue light to the retina than adult eyes. Establishing healthy light habits early can support better sleep patterns throughout childhood. Our lights contain no UV emissions and operate at safe, low temperatures.