I have a four white led light that I'm very happy with and use just about every day. But that wasn't always the case.
I built it myself and when I first got it going it gave my eyes kind of a weird feeling when I used it in normal ways. It's like I couldn't adjust my eyes to the hot spot in the beam. I made a light green filter to remove the blue cast in the beam but still the same funny feeling.
Then I ground the round tops off the white leds and polished them smooth with toothpaste and the funny feeling in my eyes went away when I used the light. That was a few months ago and I've been using it very successfully ever since.
I have some red and yellow leds with round tops and hot spots in the beam but I don't get the same funny feeling from them. I also tried the same thing with a regular flashlight. No problem. As far as I can tell, the funny feeling I get is only when I use round top white leds.
I just moved on and wondered if there was something funny going on with my eyes because of all the dry winter air and allergy stuff and all that.
Today, after not thinking about this for quite a while, someone showed me a three white led head lamp they got at the backpacking store. I tried the same experiment. I found a dark corner in a lighted room and shined the beam on an object about three feet away, and sure enough I got that same funny slightly overexposed feeling in my eyes.
What do you think about this?
I built it myself and when I first got it going it gave my eyes kind of a weird feeling when I used it in normal ways. It's like I couldn't adjust my eyes to the hot spot in the beam. I made a light green filter to remove the blue cast in the beam but still the same funny feeling.
Then I ground the round tops off the white leds and polished them smooth with toothpaste and the funny feeling in my eyes went away when I used the light. That was a few months ago and I've been using it very successfully ever since.
I have some red and yellow leds with round tops and hot spots in the beam but I don't get the same funny feeling from them. I also tried the same thing with a regular flashlight. No problem. As far as I can tell, the funny feeling I get is only when I use round top white leds.
I just moved on and wondered if there was something funny going on with my eyes because of all the dry winter air and allergy stuff and all that.
Today, after not thinking about this for quite a while, someone showed me a three white led head lamp they got at the backpacking store. I tried the same experiment. I found a dark corner in a lighted room and shined the beam on an object about three feet away, and sure enough I got that same funny slightly overexposed feeling in my eyes.
What do you think about this?