Oh yeah!
Straight up drop in replacement for multi cell flange style maglite bulbs
http://www.superbrightleds.com/cat/b-series/
I got the 1 watt ( 7~26 VDC) in my 18vdc porter cable tool light, and a 3 watt in my 3-D cell maglights and they work AWESOME…the one I got for the dewalt at lowes got CRAZY hot and melted the retaining ring…after I put these in em…very good light, almost NO heat at all, and they run forever!
Make sure you get the right voltage