i have a few candle lamps and the large UCO is the best i have found.the tea lamp not so much as what you have once it's burning is a aluminum cup full of hot wax with a wick in it.a bad move and it spills out.i would carry a LED light of some sort in a survival kit but the tea lamp is fine for the sort camping where you want to have a few on a table at nite.the big UCO with the push-up candle works great and as you can see in the photo with a shade/reflector it will cast enough light to read by.but these are camp items and in a BOB or real survival kit i would want a LED that was only used when needed.