I had provided a Bighead with a Megaray bulb, but found that after 3 or 4 days his eyes were swollen and he had become lethargic. I immedietly removed the bulb and everything was status quo again a week or so later. It's important to remember that megacephalum are nocturnal and spend the majority of the day tucked in rocky crevaces. That said, I have observed captive bigheads basking, but suspect that is more of a "learned" behaviour.
The quick answer is no, much like musks, there is very little benefit to providing an MVB/UVB bulb.
Edited by thinkin_feller, 05 February 2012 - 08:09 PM.