flicker light impact on people’s health

Iphone2 can detect flicker

IEEE did a lot of research and found flicker ，

http://www.essex.ac.uk/psychology/overlays/2010-195.pdf

Summary of Biological Effects

The obvious biological effects occur: 1) immediately from 2) flicker that is visible. The risks include seizures, and less specific neurological symptoms including malaise and headache. Seizures can be triggered by flicker in individuals with no previous history or diagnosis of epilepsy.

The less obvious biological effects occur: 1) from flicker that is invisible 2) after exposure of several minutes. Invisible flicker health effects have been reported to include headaches and eye-strain.

The table in the Appendix summarizes and categorizes the types of flicker and the biological effects they cause.
http://www.essex.ac.uk/psychology/overlays/2010-195.pdf

Many lamps on the market has flicker problem, most of them can be detected by iphone2, all of them can be detected by oscilloscope.

I.Incandescent lamp

Horizontal lines are the flicker light

Bulbrite 60w 130v

II.Lamps

1.ADAMAX NEW HOUSE NHCLP-LED-PUR CLA You can see horizontal lines like waveform to move up

II.LED LAMP

2.ADAMAX NEW HOUSE NHGS-LED-RD goose neck, horizontal line is flicker

II.LED lamp

3.NORMANDE LIGHTING, GP5-3268-WH

horizontal lines to edge are flicker

Horizontal lines perpendicular to edge are flicker

II.LED

4.LED bulb FEIT BPAG800DM/LED horizontal lines are flicker light

III。Fluorescent lamp

1. Normande HM3-796 13W vertical lines are flicker light.

III. Fluorescent

2.NORMANDE LIGHTING, HS3-1506A METAL SHADE vertical lines are flicker

III. Fluorescent lamp

3.OTTLITE 97900N SPIN LAMP vertical lines are flicker

III. Fluorescent

4.OTTLITE 915083 CRAFT LAMP horizontal lines are flicker

III.Fluorescent lamp

5.OTTLITE F23WG3 FLEX-NECK horizontal lines are flicker

III. Fluorescent lamp

6.OTTLITE 315G53 TASK 13W horizontal lines are flicker light

III. Fluorescent

7.OTTLITE 717G53 TASK 13W horizontal line are flicker light

III。Fluorescent lamp

8.OTTLITE R75G59 horizontal lines are flicker light

9.OTTLITE K83G56 横线条纹就是闪烁光

upright lighting led

NO FLICKER LIGHT, No infrared, no ultraviolet, no strong blue light

www.uprlt.com

http://www.amazon.com/dp/B00IJZJ6ZS

ALL LAMP COMPARISON

all lamps side effect	incandescent	Fluorescent	Market LED	Upright Lighting LED	impact on vision and health
low frequency visible flicker	Yes	Yes without PFC	some have	No	Cause myopia; headaches, migraines, fatigue, epilepsy, and other neurological responses; Degrade reading performance;provide a distraction or annoyance for sensitive individuals.
infrared	Yes	No	Some have	No	ocular lens damage, continuous wave retinal damage; lens protein denaturation and cataracts This is photothermal damage.
peak strong light	Yes	Yes	Some have	No	keratitis (corneal epidermal necrosis, loss), eye pain, photophobia and tearing. Injury to corneal, lens, retina; Vitreous injury;dry eye; photoreceptor cell damage; age-related macular degeneration; macular retinal choroidal damage.
ultraviolet	No	Yes	Some have	No	cataract,premature presbyopia,Pterygion; Retinal degeneration, retinal damage,photochemical lesions in the neural retina and retinal pigment epithelium; macular disease, blurred vision and image distortion symptoms. Chronic blepharitis, conjunctivitis, conjunctival elasticity and gloss loss, and pigment hyperplasia. UV-induced electric photophthalmia; customary system electric ophthalmia, the ultraviolet radiation keratoconjunctivitis. Skin aging black or skin cancer;This is photochemical damage.
unsafe electromagnetic raidiation	Yes	Yes	Some have	No	1)cell carcinoma induction; 2)abnormal hormone; 3)intense calcium loss; 4) triggering dementia; 5)abnormal pregnancy and abnormal birth; 6)high blood pressure and heart disease; 7) electromagnetic hypersensitivity; 8) depression increase.
high frequency invisible flicker	No	Yes	Yes	No	Retinal degeneration,Choroidal neovascularization,photomechanical damage;headaches and eye strain.
low frequency ripple flicker	Yes	Yes	Yes	No	Cause myopia; headaches, migraines, fatigue, epilepsy, and other neurological responses. Degrade reading performance, provide a distraction or annoyance for sensitive individuals.
unsafe blue light	Yes	Yes	Yes	No	veiling glare intense enough to degrade visual performance,macular degeneration and other vision problem, photochemical damage and apoptotic cell death, and retinal injury. Blue light induce damage to retinal pigmented epithelial cells.
dimming high frequency flicker	Yes	Yes	Yes	No	Retinal degeneration,Choroidal neovascularization,photomechanical damage

aMAZON Customer feedback

Date	Comments
10/15/14	Fast delivery. thank you guys! (Response Removed)
9/17/14	I found out about this but reading a study of lamps. At first ,this lamp seemed like it might not be enough light, but my eyes have seen the difference. They are not as tired after long stints reading. I don’t feel the strain and fatigue that I had under my old desk lamp with the harsh fluorescent. I was skeptical initially, but perhaps I didn’t need as much light as I thought. I’m keeping it. (Response Removed)
8/26/14	Excellent product from caring creators/sellers, who promptly answered questions about a research article they wrote. I felt as if they cared about my well-being. I have experienced improvements to my vision, less dizziness and migraines, and an ability to stay focused longer. I highly recommend this for anyone who has seizures, migraines, dizziness, fatigue, or just needs to stay focused. (Response Removed)
4/18/14	Lamp is excellent. Thanks! (Response Removed)