http://www.dorcy.com/41-2498.htm
If you need longer runtime steal the bulb and put it into one of these.
http://www.dorcy.com/41-1015.htm
I have used the LED bulb in one 4D focussing lantern and three 4AA ones. Be aware many other lanterns are reverse polarity and will not work with LED bulbs.
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3rd_shift said:
Try
www.superbrightleds.com here for some inexpensive pr bulb dropins for standard flashlights.
You should be able to stock up on a dozen good led'ed lights for less than $100.
Keep all these cheap lights around the house and just move onto another light when the batteries in the one you are using finally give out.
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Click on the HERE for the sales page.
My impressions of the bulbs:
The 10mm 6V is very dim. Noit much brighter than a single 5mm.
The 2x5mm focus best in a standard reflector flashlight. Still not too bright.
The 3x3mm 6V is not in focus either axially nor raidially. The resulting beam is 3 overlapping rings. Sorta like the olympic logo with 2 of the rings missing. The 6V version is brighter at 4.5V than the 4.5V version!
All the above bulbs will NOT work at 3 volts. (2 cell flashlights)
The new PR2-W1-WVR LED FlashLight bulb is a nice surprse. I think it uses one of the new 1/2 watt LEDs. Very bright for a single LED. OK, OK, it is not a luxeon so it is not THAT bright. Floody beam with no throw. I estimate 6+ hours in a 2AA, 16+ in a 3AA (I have one in a 4AA NiMH light = 4.8V)
Of course if you use D cell lights you should get 7 times the runtime. YMMY.