These are awesome for looking at holograms (as a lab flashlight) and also for general use. They are warm white and have good color-rendering capabilities. I like to give them away as gifts to friends, along with the rechargeable batteries and charger.
http://www.ebay.com/itm/171908899496?_t ... EBIDX%3AIT
http://www.ebay.com/itm/391220668076?_t ... EBIDX%3AIT
(there is a mistake in the flashlight listing about it using AA batteries, actually is uses the 18650 as above)
LED flashlights
Re: LED flashlights
Just a warning about those cheap Chinese 18650 batteries and chargers. 18650 batteries can have quite low internal resistance (as some are designed for high current draw) and can vent or blow up if either the battery or charger are defective. It might be unlikely but still worth being cautious.