FAQ Blue Light & Blue Light Glasses: What to Know, What Works, and What’s Just Hype
- Gabriel Donaldson
- May 30
- 3 min read
Updated: Jun 7
🤔 Frequently Asked Questions About Blue Light & Blue Light Glasses
🔍 Note: This post is 100% educational — no sales pitch, just science. Our goal is to help you understand how blue light exposure affects your health and how tools like blue light glasses actually work (or don’t). We understand how our environment impacts us (especially through EMFs) and the need for 3rd party testing — so here's some helpful resources up front!
What is blue light?
Blue light is a high-energy visible (HEV) light on the electromagnetic spectrum, with wavelengths between 400–500 nanometers. The most biologically disruptive wavelengths fall between 415–455 nm. It’s naturally found in sunlight but is also emitted by digital screens, LED lights, and other artificial lighting sources. See NIH study on blue light and circadian rhythms.
What are blue light glasses?
Blue light glasses (also called blue light filter glasses or blue blocker glasses) are eyewear designed to filter or block wavelengths of blue light, particularly in the range associated with melatonin suppression and eye strain.
What do blue light glasses do?
They reduce your exposure to artificial blue light, especially during evening hours. When properly tested, they help minimize:
Melatonin disruption
Digital eye strain
Sleep interference
Fatigue and screen-related headaches
Do blue light glasses really work?
✅ Yes — when they are tested and block light in the right wavelengths.
❌ No — if they rely on marketing buzzwords without lab-verified data.
Look for brands that show spectral transmission data, ideally showing reduction in the 415–455 nm range. More on how filtering works – NIH.
Can blue light glasses help with sleep?
Yes. Exposure to artificial blue light at night has been shown to suppress melatonin and delay sleep. Wearing effective blue light glasses in the 1–2 hours before bed can help improve sleep quality. See Harvard Health’s summary: “The Dark Side of Blue Light”.
When should you wear blue light glasses?
Daytime: Optional — may help with screen fatigue
Evening: Highly recommended — wear them 1–2 hours before bed to protect melatonin production
Late-night screen use: Essential if you’re using devices close to bedtime
What’s the difference between clear lenses and orange/red lenses?
Clear lenses may block only a small portion of blue light (often <30%) unless specially engineered
Amber or red lenses usually block much more blue light, especially in the melatonin-disrupting range
Do blue light filter apps work?
They help visually by changing the screen tone, but they don’t actually block blue light emissions at the wavelength level. Best used as a complement, not a replacement. Study: Blue Light Filter Apps and Sleep Quality.
Are warm lightbulbs actually safer?
Not always. Many “warm” LED lights still contain a 450 nm spike (disruptive blue light), even if they look yellow or amber. Always check for spectral testing or choose bulbs labeled circadian-friendly or low-blue.
How can I reduce blue light exposure at night?
✅ Use blue light glasses (with testing data)
✅ Install filter apps or use device night modes
✅ Switch to red/orange lighting in the evening
✅ Take screen breaks (20-20-20 rule)
✅ Limit screen time before bed (if possible)
📌 TL;DR Summary
Blue light can disrupt sleep and contribute to eye strain — especially at night
Blue light glasses (aka blue blocker glasses) work if they filter the correct range (415–455 nm)
Apps and warm lights help, but aren’t foolproof
The best approach is layered protection: glasses + lighting + screen habits
Always look for science-backed products, not vague marketing terms
Protect from EMFs; What do EMFs do?
EMFs stack off of each other as another potent stressor and energy leach in our environment that cause or contribute to: brain fog, pain and joint damage, low energy, nervousness, anxiety, skin breakouts, ADD, ADHD, fatigue and depression. If you're concerned for your families health & wellbeing and want an easy preventative measure, head to our catalog for legitimately one-of-a-kind, handmade jewelry. (And no, the photos don't do them justice!)
– The Bioenergetic Jewelry Team
🧾 Sources & Citations
All sources are integrated above. For quick reference:
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