Sunglasses for High Power LEDs - Page 1
Forum section: electronics / general

author: jbruell94
author_rank: Newbie
timestamp: September 15, 2015, 08:48:37 pm
content: Hey there! Does anyone know of any recommended pair of sunglasses that will allow for pretty much looking into the sun.

author: orbiter
author_rank: Frequent Contributor
timestamp: September 15, 2015, 08:54:18 pm
content: Do not use sun glasses.. A welding helmet glass screen can be used.

author: AF6LJ
author_rank: Unknown
timestamp: September 15, 2015, 09:03:22 pm
content: http://www.skyandtelescope.com/astronomy-news/observing-news/how-to-look-at-the-sun/Here is some good advice.

author: m98
author_rank: Frequent Contributor
timestamp: September 15, 2015, 10:01:42 pm
content: High power LEDs are not nearly as bright as the sun. A pair of welding goggles will do the job.But why would you want to look directly into a high power LED?

author: marshallh
author_rank: Unknown
timestamp: September 16, 2015, 05:04:55 am
content: He probably bought a new router and wants to get up to the bathroom at night without etching the blue leds into his retina.

author: sleemanj
author_rank: Super Contributor
timestamp: September 16, 2015, 05:47:28 am
content: It looks retarded, but for testing high power LEDs, I tape anti static bags over a pair of sunnies. Works a treat.

author: sleemanj
author_rank: Super Contributor
timestamp: September 16, 2015, 05:50:48 am
content: Quote from: m98 on September 15, 2015, 10:01:42 pmTo check that all the die are running at a modest current. If you don't darken it, you won't be able to see if a column is out, and running at low current may give you a false indication of a column being out (because chinese led die which are not particularly well matched)

author: pickle9000
author_rank: Super Contributor
timestamp: September 16, 2015, 06:22:40 am
content: Search for "auto darkening" on ebay and get a welding shade, you can adjust the shading and lick-in level. Easy ans safe. Less than 10 bucks.

author: ConKbot
author_rank: Super Contributor
timestamp: September 16, 2015, 10:26:00 am
content: I'd start off with a pair of oxyacetalyne goggles, the #5 lens should be dark enough, and they are in the sub $20 range. Unless you've got a huge array of 100W leds, and you're looking up close,I can't imagine needing a full face shield.

author: m98
author_rank: Frequent Contributor
timestamp: September 16, 2015, 03:21:53 pm
content: Quote from: sleemanj on September 16, 2015, 05:50:48 amRule No. 1 when dealing with any high power light sources: If you can avoid looking into them with your eyes, avoid it.Better use a Camera and set it to small aperture and short exposure.

author: jbruell94
author_rank: Newbie
timestamp: September 17, 2015, 07:50:59 pm
content: Thanks for all the awesome responses!I work at Grove Labs and am working on new LED lighting solutions for plants. Most of the time I am working on the power electronics around them and having my peripheral vision blinded, and headaches.I'll pick up a "auto darkening" welding visor and some oxyacetalyne goggles.Until those come in the mail, gonna use some anti static bags haha

author: Melt-O-Tronic
author_rank: Frequent Contributor
timestamp: September 17, 2015, 08:36:03 pm
content: Quote from: marshallh on September 16, 2015, 05:04:55 amIt's as if you can read my mind.Kapton tape is pretty decent for attenuating blue LED's, although I have 2 layers on my bedside phone charger and I'm thinking about adding a 2-inch thick layer of coal tar.

author: onesixright
author_rank: Frequent Contributor
timestamp: September 18, 2015, 09:52:56 pm
content: If you have som old film laying (as in photography). Cut it and stack 2-3 together(used it for looking into the sun-eclipse!)

author: SeanB
author_rank: Super Contributor
timestamp: September 19, 2015, 01:24:04 pm
content: Quote from: Melt-O-Tronic on September 17, 2015, 08:36:03 pmVoid the warranty and replace the 470R 0402 resistor feeding the led's with 4k7 to12k resistors. They will still light, but will not be a "cast a shadow in direct sun" brightness. I just used scrap resistors off old defunct PCB's ,as i did not have any new ones around, and to buy one would have meant a delay or fuel cost. Plus i had the scrap boards in the ewaste pile, must take it to the big container at Makro some time.

author: German_EE
author_rank: Super Contributor
timestamp: September 20, 2015, 07:22:22 am
content: My personal preference is to replace every blue LED I can find with a green one, I might void a few warranties but I don't care. For those annoying lights that you can't get at a dab of red nail polish attenuates the output to more reasonable levels.