I think it would absolutely be worth giving a try. I would go with something gentle and place a "spot source" close to his heat source. I would use one of these from Arcadia for a colubrid, placed next to a radiant heat panel. A 2% bulb certainly won't hurt him, just give him hides (which it sounds like he already has) and put it on a normal light timer and voila.
There are a variety of sources suggesting uvb may be beneficial for snakes and several anecdotal reports of various crepuscular and/or nocturnal species basking under UV light when provided.