Not familiar with that one. Is it a tube or a cfl?
The only way to know if it is producing adequate UV at tortoise level is to put a good UV meter under it.
During the summer months, I like to sun my babies in a safe outdoor enclosure for an hour or two a few times a week. Be very careful that your baby doesn't over heat outside. I always give them a 20-40 minute soak when I bring them back in.
This depends on your temperatures and your enclosure. It is generally a good idea to have a CHE controlled by a thermostat to maintain the correct ambient temps day and night for a hatchling of any tropical species.