Linda,

a 2 gram loss is not too much, that is only about a ...4% weigh loss. But of course a baby should always be increasing, so it is a concern but nothing to be alarmed about. I think if it is drinking a little of the enriched solution everday (still provide fresh water) and you are giving him the right conditions to want to eat-then it will begin to eat as soon as it is hungry. A month is not unusual for a turtle to go without a hearty appetite if he is stressed about a recent habitat change.

Any kind of plant grow light is OK-those used by African Violet growers are fine. The ones for fish tanks with live tanks are OK too.
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Tess Cook
www.boxturtlesite.info