I have ordered 2 such inexpensive upgrades with LEDs, I know about 40 lm aperture. Easy to replace and works as advertised. Use in a 15+ year old 3 cell Maglight to extend run time when needed, even long standby times in a vehicle for emergencies - no need for high power or long range - a perfect replacement at this price point . 2. replace a lantern/spotlight with a 6V - camping style indoors again extended run time in case of power failure but otherwise on standby for the main lighting in the room - again perfect and no need to worry about a burned out bulb. I am planning to buy another one as an inexpensive upgrade to replace the old flashlight as we already have several high power LED flashlights/torches and we are not spending $15 or $20 on a single LED.
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