Here is a LED #222 bulb that can give a new and brighter lite to your old incandescent flashlights. Fits any 1 or 2 cell flashlights . Note in some cases you might have to invert your batteries so it works because LEDs are polarity sensitive. The bottom pin must get the positive + current. Get one or more now and start $aving on bulbs and batteries. These energy efficient E -10 bulbs get an average of 2- 5 times the battery life over regular incandescent bulbs.