A few years ago I bought a Milwaukee under hood light that I have used for countless hours under the hood, in the cabin, and under the frame of my Jeep and other project cars. One thing I really like about the under hood light is that a few minutes before the battery is about to die, it gives you a few intermittent blinks as a warning.
The bar that holds the light is spring loaded and allows it to grip a hood, inside of the passenger compartment roof or just lie on the ground. The light itself can be twisted on the bar to allow it to be pointed in any direction which helps to eliminate shadows. The spread of the light is very broad and lights up an engine bay or undercarriage wonderfully..
It is a bit more task specific than the light Blaine showed but I would 100% buy it again it I lost mine.
Here are a few pictures I grabbed off the internet.
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