Hello Tortoise Forum. So basically it rains everyday in my area (because of rainy season). Most of the days are cloudy. Because of this, i am not able to provide much UVB to my tortoise. Only 2-3 days a week I keep my tortoise in sunlight. Do I have to shift to artificial UVB lights? I still don't see any lack of activity in him. to be honest, he is even hyperactive when he sees his food (especially cucumbers lol).