Stop doing what? The problem is it does not work.
...a 3v flashlight bulb......If I plug the bulb in to the 5V and ground it lights up just fine
It just seem like using a diode and transistor to just light a light bulb seems like allot of work
Since LED's are polarized, unless I soldered them on to a base of some kind they could not be removed and re-inserted easily. Especially if you are having a spectator do it.Also, I could not find any screw in colored low voltage LED's.