use the highest wattage compact floro u can find at walmart...or lowes....will screw into any bs light fixture...i used some to vegg for 2 months...and was satisfyed....id make sure you not only hang them above the canopy but on the sides of your plant as well....the best ones u can get at walmart and are like 14 bucks last time i saw them there....they are about 10-12 dollars at lowes when i bought some there but the bigger ones at walmart have more lumens...hope this helps...peace