Yellow LED Astronomy Flashlights

Back when I had my astronomy-friendly outdoor lighting business, I used to sell yellow-LED flashlights that I bought from Robert D. Mantell in North Hollywood, California, under the trademark Lo-Glo™.

The Houston flood Memorial Day weekend 2015 wiped out the remaining inventory I had and, sadly, these wonderful flashlights are no longer available.

It is not rocket science.  You need to start with a well-made flashlight, replace the regular bulb with a yellow LED and the appropriate current-limiting resistor, and voila!

Yellow may be better than red.  See the article by Robert Dick, “Is Red Light Really Best?”, in the June 2016 issue of Sky & Telescope.

There’s a great business opportunity here.  It wouldn’t take much to make a better astronomy flashlight than what Orion and others sell.  Besides, I have found these yellow-LED flashlights to be most useful for moving around the house after bedtime (such as a bathroom trip) to avoid being exposed to any bright light at night which would affect your night vision and even your circadian rhythm.

If you know of any astronomy-friendly yellow LED flashlights or would like to manufacture some, please post a comment here or contact me directly.

Bob Mantell’s wonderful yellow LED / amber LED astronomy flashlight
These flashlights are also perfect for getting around the house at night without having to turn lights on, the glove box of your car, reading at night, and many other uses as well.

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