No question about it. Pro Lock's Super Probe. It takes a makita 9.6V battery. I've owned about five different car opening lights over the years and this one is the best I've ever owned!
The first time I ever saw one was at an ALOA convention. (This was before ProLock purchased it. It was then called the "Jiffy Light") There was a car door set up with the light inside it and turned on. Even in a well lit convention hall you could see everything in the door (including the twenty and fifty dollar bills laying in the bottom of the door.
There was a large gentleman sitting at the booth sort of laid-back with his hands folded over his large gut. I asked him what the twenty and fifty were doing in the bottom of the door.
Without missing a beat, (in a strong southern draw), he replied, "Boy, that's what yer 'spozed ta see when ya look in a car dow-er!"
I bought one on the spot! And to this day, I've never seen a better one. It runs about $90 (not including the battery), but worth every penny!!!
Bobby