Definitely, goto http://www.e-conolight.com/ and then copy and paste this item:
Product/EProductDetail.asp?ProductFamilyID=7&FGNumber=E-MT5H151G
$25 and $12 more for a bulb, I'd definitely go HPS when/where possible.
They have 70w Mh bulbs too, but honestly I have found CFLs and the fact...