You may want to try Pacific Aquariums down by Delancey. They carry alot of supplies and there prices on dry goods aren't that bad. Also if you pay cash they probably give you the tax off.
What kind do you need? I have 2 28watt Panasonic bulbs. Not sure of the kelvin but they are daylight, I can look up the part number when I get home, they were used about 2 months before I switched to 50/50's. You can have one or both cheap of trade for any frags...