pardon me as i put this into idiot proof format: lower number on packaging is actual wattage output of bulb cfls are good for seedlings and veging as they have the lowest lumens output needed in early stages of development and also are good because they put out little to no heat now for a secussfull grow you need a average of 8000 to 15000 lumens per plant throughout its lifetimem dependent on how tall a plant and strain it keeping in mind cfls good track record for veging it'd take a shitload of cfls to achive the desired lumens output in later stages of its life cycle therefore unless u wanna do like garden knowm at 14+ cfls per plant then invest in a hps 250+w also im assuming your growing more then 1 plant unless your just very gullible and dont know what the hell your doing and dont mind wasting 3 to 4 months ona male, therefore use the cfls for veging/cloning then switch off to the hps for flowering this is also the best way to have a self sastaning harvest periodicly for those tomatoe lovers outthere ...luck...