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    For presentations 635nm 1mW or 5mW

    This is my first post in the laser forum. Hello everyone. I present quite frequently and need a new laser pointer. My old pointer (now gone) was a little dim when used in a big hall with powerful projector. I have my heart set on the red-orange AtlasNova 635nm lasers. The question is: Is the...
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    LED+Incandescent = Excellent color rendition (TwinTask)

    I have always liked the good color rendition of incandescent bulbs, but they tend to become a bit yellow towards the end of (alkaline) battery life. Today I borrowed a StreamLight twin Task 3AA from a colleague and bridged the switch so that both the LED and xenon would light up at the same...
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    Highest Voltage NiMH AA under low load

    I have this great Mp3 player that takes one alkaline/ NiMH AA battery. Quite convenient as I can always bring an extra battery (I dislike built-in batteries). By the way this MP3 player hobby goes pretty nicely with evening walks and a flashlight hobby :grin2: Anyways I noticed that sound...
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    Smoother spectrum LED flashlihgts

    I see that Warm White LEDs are starting to make progress in the efficiency department. "Seoul Semiconductor Unveils Warm White Acriche of 42 lm/W" http://www.marketwire.com/mw/release_html_b1?release_id=241066 Anybody knows of plans for a smoother spectrum flashlight sporting one of those Warm...
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    Extreme cold flashlights

    Wonder what flashlights they use at polar expeditions. I guess metal body flashlights are impractical since they tend to stick to bare hands. In his book Alone Evelyn Byrd describes it this way Cold does ***** things. At 50 degrees below zero a flashlight dies out in your hand. At -55...
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    Older Chargers and new NiMH cells /2700mAh, Eneloop, RayoVac Hybrid/

    I wonder if my 3 year old MH-C401FS Maha charger is good for the new high capacity cells. The 300mA on "slow charge" seems pretty low (0.11C for a 2700mAh cell). On the other side it has been recommended to avoid the fast charge mode of this charger. Could some of the more knowledgeable members...
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    Mixing warm white and cool white LEDs (easy mod)

    I experimented with mixing Warm white and standard white leds in one flashlight. The resutls were quite interesting. Findings: I found surprizingly better depth perception and just ability to "notice" some subtle details. I compared my "mixed led" flashlight with a 0.5W Advancedmart standard...
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    The New Gerber Infinity Ultra-M now for $29

    I saw the New Gerber Infinity Ultra-M for $29 at Base Gear. Advertised as American made and with the better anodizing. http://www.basegear.com/gerber-infinity-ultra-m-military-led.html Anyone has any clue as to how the beam shape, tint, brightness would compare to the currently sold standard...
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    Warm White LED for better outdoor color rendering

    Advice needed :candle: 1. I find that my LED lights are great indoors, but outdoors the feeling is very ghostly. The light has this moonlight quality and makes objects look flat. I think this has something to do with the spectrum of the LED lights. Light gray tree bark is quite bright and...
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    Prebuilt adjustable (Not Wide Open) sandwiches

    Hello I am new here and trying to get the taste of a sandwich. I love the form factor and the efficiency. Q: Can I actually buy one that can be set to 200 - 250mA? I would love a long lasting light with a high dome Luxeon. I think if slightly underdriven, the efficiency would be highest. All I...
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