CFLs do not have a great watt/lumen ratio (60-65 LPW). But, they are compact, so you can a lot of the light onto the plant where on a 4' tube (85-95 LPW) it may be difficult to get most of the tube close to the plant. HPS are 90-120+ LPW.

Shov
Shovelhandle Reviewed by Shovelhandle on . Help buying a grow light plz I have am planning on growing 2-3 plants and am looking to buy a grow light for $85 or less. I am thinkign about making a grow box out of a old dell computer I have so I am trying to find something small. Anyways would you have any lights you would recommend for me? Would this be a good light? http://cgi.ebay.com/GROW-LIGHT-FLUOREX-HYDROPONIC-400-600-1000-WATT-MH-HPS_W0QQitemZ260076282543QQihZ016QQcategoryZ42225QQrdZ1QQcmdZViewItem Thanks for all your help. Rating: 5