Hi summer & hot humid weather with plenty of sunlight is upon the region where I live, I get up to 28-30 degrees indoors & 32-35 degrees outdoors so I decided UVA+UVB bulbs isn't needed since it cause excessive heat in the enclosure & by taking my tort outdoors for up to an hour of natural sun ray was enough vitamin D3 + additional calcium with D3 supplements to her diet was suffice.