Yes, the bulb is not strong enough. It does not provide enough uvb across the entire cage. You will have to buy correct lamp as well. Also, your cage is very small, and although i am not sure with Jackson’s chameleons, you would need to make it bigger if it were panther or veiled chameleons.
Welcome! It would be helpful if you could fill this out so we can check your husbandry.
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...