If you want to get that enclosure, then by all means get it.
Being 12"H, you have to take into account the distance from the bulb to the basking site. The bulb will only be 8-9" above the bottom of the enclosure, a 50 watt spotlight bulb, will make the bottom of the enclosure to hot, let alone adding something to bask on. Use a regular bulb, but have something to measure the temp.( Ir gun, thermometer) don't guess or assume, you don't want to cook your beardie or cause dehydration. You may have to get different watt bulbs to find the appropriate temps, look for 25, 30, or 35 watt bulbs, and take it from there. They do have 40 watt spotlight bulbs at Home Depot, they have other wattages available too, just make sure you find one that fits the socket in the enclosure. Cheers.