I've always used household incandescent bulbs in the 25-100 watt range for my relatively small frogs,lizards and tortoises.
I put them in the domed clamp-on lamps you can get at Home Depot for a few bucks. It's important to check the recommended bulb size for the lamps. The small lamps often are limited to 60 watt bulbs. Also, it might be better to get the lamps with ceramic fixtures if you are going to use high watt bulbs.
For UV I've been sticking to Daylight, Sunshine, or Full-Spectrum fluorescent bulbs from manufacturers like GE. The bulb gives off a little UVA and UVB and provides semi-natural lighting. And they are cheap. I also supplement my animal's diets with vitamin D/calcium powder, or feed them pelleted foods that already have D. My lizards and torts also get exposure to unfiltered sunlight during warmer months. My russian torts stay outside from about April to October and I don't give them any D supplements during that time. My bearded dragon goes out in a screen cage several hours a week in the summer.
I also put the cheap UV bulbs into cheap fluorescent fixtures from Home Depot.
For larger animals like monitors or sulcatas you might need to use a more dedicated heating setup. Probably best to consult the appropriate forums for that.
I try to avoid buying things from petshops that can be obtained from other, lower-priced sources.