My orange CFL drop light from HF(Corded). Best $8 ever, their cordless stuff is **** though. I use a Coast G20 for up close or spot inspecting.
I m looking into Underhood lights next.
I've got 3x of the HF $9 on sale CFL, one double tube like 18 watt Bayco, brightest by far is a cheap 8" aluminum reflector clamp light with a 30 watt CFL. I'm thinking hard about a Mountain UL39 39 watt tube underhood light about $90. There are lights in the style of the Bayco, but with 36watt or 52watt 4 tube CFL around $60 that work well too.
LOTS of flashlights, check out;
http://www.candlepowerforums.com/vb/forum.php
http://budgetlightforum.com/forum
My EDC is a SK68 clone (I have 3 so far), about $5 from China, 1xAA and nice and bright, swap in a 14500 (same size as AA, but 3.7v lithium) and its about as bright as that size will support due to heat. Dozens of vendors sell them with variations on the original, on/off, 3 to 5 modes, different types and efficiency of emitters, all are spot to wide zoom with a clicker tail switch.
In the mail I have a Olight i3S, about $20 tiny, 1xAAA, still has serious 80 lumen output, 3 modes, and you don't even notice it on keyring or in pocket.
Want list, Zebralight SC52, smaller than SK68 types, absolute max light output from a 1xAA or 14500, quality light, about $65.
Headlight
I bought a cheapy headband light, found out how incredibly useful it is to have both hands free and light always where your head is pointed, bought another better cheapy, like it a lot ($6 or so shipped) 3xAAA, hi lo, and a very handy lo red so you don't disturb others or lose night vision in the dark. Someday I will buy a better quality headlight, but this one isn't bad.
Toolbag lights are mostly HF freebies, but I use quality batteries, Sanyo Eneloop rechargeables which are more than $2 each, so a free 3xAAA light ends up more expensive than $5 SK68 clone 1xAA. OTOH there are free after rebate Duracell alkalines at Staples from time to time, may do that. Batteries the HF free lights come with are junk and leak once any of the 3 cells goes dead.
Toolbag, big light, I've got a $12 big brother to the SK68 clone that is 3xAAA and throws some serious light out the end, but too big for a pocket, almost too big for toolbag.
Puck and Larry lights. I have a Nebo Larry, looks like a fat pen in pocket, with 8 LED on the side opposite the clip (which has a powerful magnet in it) its a single mode on/off flood, and very handy. Puck are the 27 LED puck shaped HF $3 on sale lights, both are 3xAAA btw. Puck is more focused fat spot, Larry more flood. Several of both works well.