the thing has made my mac lite a SpotLite it is super bright and yes I have my mac lite yes for so long with 6 cells as a real serious flashlight that I had previously only equipped with light bulb had yes the batteries I swapped often, and also temporarily so ne small bright light but even these eventually gave up the ghost. when I had this bulb LED application found. and now so that's my thing flashlight super bright even with weak batteries super. clearly the focus, and the dark spot in the middle ... so what is a mac lite the hällt forever with something I can live with