Iphone2 can detect flicker
IEEE did a lot of research and found flicker ，
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.
Many lamps on the market has flicker problem, most of them can be detected by iphone2, all of them can be detected by oscilloscope.
Horizontal lines are the flicker light
Bulbrite 60w 130v
1.ADAMAX NEW HOUSE NHCLP-LED-PUR CLA You can see horizontal lines like waveform to move up
2.ADAMAX NEW HOUSE NHGS-LED-RD goose neck, horizontal line is flicker
3.NORMANDE LIGHTING, GP5-3268-WH
horizontal lines to edge are flicker
Horizontal lines perpendicular to edge are flicker
4.LED bulb FEIT BPAG800DM/LED horizontal lines are flicker light
- Normande HM3-796 13W vertical lines are flicker light.
2.NORMANDE LIGHTING, HS3-1506A METAL SHADE vertical lines are flicker
III. Fluorescent lamp
3.OTTLITE 97900N SPIN LAMP vertical lines are flicker
4.OTTLITE 915083 CRAFT LAMP horizontal lines are flicker
5.OTTLITE F23WG3 FLEX-NECK horizontal lines are flicker
III. Fluorescent lamp
6.OTTLITE 315G53 TASK 13W horizontal lines are flicker light
7.OTTLITE 717G53 TASK 13W horizontal line are flicker light
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
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
|10/15/14||Fast delivery. thank you guys!
|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.
|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.
|4/18/14||Lamp is excellent. Thanks!