I picked up a Kobalt Hyper-Coil LED light kit at Lowes this weekend. They are on sale 40% off ($24.99), so I couldn't resist. Seems odd they are on sale since it's a brand new product and they're even advertising it on TV, but I wasn't complaining.
It has rechargeable Lithium-ion batteries and can also run 3 AA batteries (and also has a 3 year warranty). I used it configured as a flashlight.
I can only speak to white paint for now, but I compared it to my Brinkman Xenon and also to a 250 lumen Cree LED flashlight. With the right settings the Kobalt actually works better for light scratches on white paint than the Brinkman (the Cree flashlight is the least effective of the 3). The Kobalt actually worked best on the low setting (which they say is 100 lumens, compared to 200 lumens on the high setting), and with the focus just slightly backed off from the narrowest beam.
The Kobalt is a more blueish-white light compared to the warmer yellow Brinkman xenon.
Anyway, might be worth a try, given the sale price and 3 year warranty (and also the alternate "snake" neck configuration when used as a work light.