So I use a digital thermometer with a probe for basking, an infrared temp gun to spot check areas, and three digital thermometer-hygrometer combos to check ambient temps and humidity levels throughout the cage (one near the top, one in the middle, and one at the bottom). I’d definitely recommend getting a digital thermometer with a probe for basking temps 100% because that is crucial for any animal, especially a female veiled, to get correct and measure accurately! I use plain white light incandescent bulbs from Home Depot. You have to play around with the wattages until you get the right one.