Yes, I put the Mag-Lite filiment bulb in the Dorcy flaslight. It is very bright, 6 volts vs 4.5 volts. But the battery life is short.<br><br>As to the current differences, they should be minimal since some manufacturers slightly overdrive the LEDs to make them more bright, the reduced current should bring it more in to the low end of the operating range for longer life. I could not tell the difference by eye in light ouput from one to another.<br><br>I am sure that the light output will come back to normal with new batteries. I just don't want to change them untill it finally quits. If it hasn't died in another month, I will give up and change the batteries.<br><br>I have to admit I am impressed by this, I thought it would have gone dark several weeks ago.<br><br>Enjoy life, Mike Mc