You can get the "curly" bulbs at HD
or Walmart. I have used the 20W and some higher with good results.
Forgot to say that these are daylight bulbs and will say 6500K on the package.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,