Recent content by Robin Dobbie

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    New Type of LED's -- What Are They Called?

    Citizen's CLU550 is a 500 watt COB that is 38mm or 1.49" square. I don't know how much more fun it is to cool multi-hundred watt emitters smaller than that due to heat concentration.
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    Zebralight quality has been a big disappointment

    For certain applications, iguess.jpg. For general flashlight usage, I can't imagine how they're not a waste. Waste of time, waste of materials, and not even as high-drain as a good 18650. But at least there's some advantage over alkaline. If OP had either rechargeables or lithiums, messes would...
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    Zebralight quality has been a big disappointment

    Even many ebay cheapie AA lights also accept 3.7v 14500 cells. It's surprising to me that any premium AA light wouldn't also accept them. But looking at some Zebra AA lights, they don't. Weird. The couple zebralights I looked at also claimed their operating voltage is .7 - 2v. To me that seems...
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    Geocaching Night Vision

    Acting like you belong is a lot easier to do if you also *look* like you belong. One-piece coveralls, hardhat, safety vest, safety goggles might help with that. Or some kind of uniform. I was at a party once and somehow I was talking to a friend of a friend who was a cop about what he does when...
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    Which lights shine for you during a long power outage?

    I have an older eco-i-lite that turns on automatically when the power goes out. Wireless charging. There's not even any charger contacts, it's totally sealed. Not sure what that means for eventual battery replacement, however. It has a little cradle/nightlight and you just lift it out of to turn...
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    What Lights Do Trains Use?

    Are you going to get another alternator or two to supply the wattage? You can get voltage boost converters for like $20, but the power has to come from somewhere.
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    anything comparable to the protomachine?

    Looks like it's been months since you asked. But you came back after a few years to ask again... If you're willing to do some work, on amazon and the auction site, as well as the chinese sites, there are some RGBW lights in a hexagonal housing with a bracket meant to be used by DJs or whatever...
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    How to determine optimal voltage and current on unknown 100w CoB?

    Bought a 100 watt COB on the auction site for cheap. The manufacturer is unknown and the listing has somewhat vague and maybe incorrect specs. I was thinking of putting it in a box with a camera. I could use the hdmi out to see the histogram and figure out the max output/min wattage while...
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    Where to buy glass aspheric lenses?

    I couldn't find any similar to the Sipik size with the flange like the SK68/98 lights have. This is something I had been looking for, myself, as I have several SK68 and SK98 lights, now. I've sort of stopped looking since I've come to appreciate the gradual light falloff or vignetting of my...
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