How about something like the Petzl Zipka/Tikka? They have a couple of white brightness settings, but they also have a red light you can switch to. I find I use the red light a lot when rummaging in the tent. The red light seems to be a lower brightness than the low white light. I know other manufacturers also make red-white combo lights. (I apologize if this was mentioned in the other thread - I didn't go read it.)