Jackson's are a montane species, so care will have to be taken to keep temps lower than tropical chams would require - especially with hatchlings. They will overheat and dehydrate very quickly. Personally, I would keep the basking temp no higher than 78 degrees, using a regular low-wattage household bulb.
They need UVB AND heat at least 10-12 hours a day, and total darkness at night, with a temp drop if possible (as has been mentioned). Whoever gave you the info re: UVB once a week and heat 10 mins. after eating obviously knows absolutely nothing about chams, unfortunately. Certainly hope they are not giving that info to prospective cham buyers/customers!
A 5.0% UVB linear tube lamp is the best. Stay away from compact or MV bulbs. You will also have to provide a lot of water, both for humidity and for drinking. Generally, chams have to see moving water to stimulate their instinct to drink. It may take several minutes of heavy misting before hatchlings actually get the idea to drink. Make certain you actually see them lapping water, don't just assume they will - hatchlings can fool ya every time.
Misting will have to be done often - 3-4 heavy mistings daily.
If you see one cham bullying the other or signs of aggression, stress or loss of appetite, you should separate them. Chams are solitary, private and stress really easily. As they mature they must be separated. Don't handle them.
Make sure they have plenty of foliage for cover and for moving about the cate, either cham-safe real plants or artificial and NO substrate at the bottom of the enclosure. A screen enclosure is best for the ventilation they require.
Good luck! I'm sure they are darling little things