cfl's or shop lights would be your best bet for lighting. use bulbs in the 6500k range. home depot sells a 36" t5no strip light that i use over my viv. downside is it comes with 3000k bulbs, so you would need to get 2 replacement bulbs for it. or you could grab a cheapie t5ho unit from one of the online vendors.
as far as critters, it is best to choose the critter first, then build the tank to suit them since different animals have different needs. for example, some dart frogs lay their eggs in bromeliad leaves and require high humidity, however, white's tree frogs lay their eggs in still water and can adapt to different humidity levels. both amphibians, but different requirements. so choose wisely