If you want someone to be able to give a potential diagnosis, include a picture of your setup and then specifications on the lighting (i.e. watts, type of bulb, etc...)
Yup send pics of your setup and it will help to determine what the possible cause could be. I recently found that lighting at night even blue lights can cause issues during daytime such as sleeping. Send pics of you enclosure and you will get help!
We need more to go one to help you figure out what might be going on. Mine will go down to his sleeping spot about an hour before lights out and get comfy. That part is normal. Sleeping during the day is not.
Please fill out this How to Ask for Help form and it will give us more information to help...
Just copy and paste and then fill in your answers...
Chameleon Info:
Your Chameleon - The species, sex, and age of your chameleon. How long has it been in your care?
Handling - How often do you handle your chameleon?
Feeding - What are you feeding your cham? What amount? What is the schedule? How are you gut-loading your feeders?
Supplements - What brand and type of calcium and vitamin products are you dusting your feeders with and what is the schedule?
Watering - What kind of watering technique do you use? How often and how long to you mist? Do you see your chameleon drinking?
Fecal Description - Briefly note colors and consistency from recent droppings. Has this chameleon ever been tested for parasites?
History - Any previous information about your cham that might be useful to others when trying to help you.
Cage Info:
Cage Type - Describe your cage (Glass, Screen, Combo?) What are the dimensions?
Lighting - What brand, model, and types of lighting are you using? What is your daily lighting schedule?
Temperature - What temp range have you created (cage floor to basking spot)? Lowest overnight temp? How do you measure these temps?
Humidity - What are your humidity levels? How are you creating and maintaining these levels? What do you use to measure humidity?
Plants - Are you using live plants? If so, what kind?
Placement - Where is your cage located? Is it near any fans, air vents, or high traffic areas? At what height is the top of the cage relative to your room floor?
Location - Where are you geographically located?
Current Problem - The current problem you are concerned about.
When's the last time you changed your uvb bulb?it could be wearing out, And what watt his your basking bulb?. It could be a number of things,buy some different supplements at least so you know what it is.