Warm, and bright enough to be used as a light source may be more of a challenge than you realize, on I assume a budget.
Maybe a 2D incandescent will run fairly well for 5 hours. I think 7 would be pushing it to use it as a light source, but it would still be ornamental.
Halloween is coming, and you may find some of those 3 AAA pumpkin lights. Maybe with an orange led.
Maybe a COB light like the little larry, or the
lux pro 137 would work... I didn't check the run time though. They are not warm, but not terribly cool white.
Then you may look at the fenix camping lanterns that are warm white with a decent amount of light, but a bit pricey. They would make nice table prizes though.