to grow good thick dense buds you need a HID light....( High Intensity Discharge ).....the lights you need for growing would be these lights...Lots use MH lights ( Metal Halide ) or HPS ( high Pressure Sodium ) the MH for the vegg stage ( 2 months ) and the HPS for flowering ( min 2 months unless u are growing lowryder )...and if you are a budget grower you can grow with the biggest compact floros you can find in your area for vegg .....unless you have what is called FULL SPECTRUM compact floros witch are very expencive just like the mh and hps lights it would be a waste of time.....my plants would be shorter and more compact if i hadnt of used compact floros to vegg them on witch im pretty sure of that...you can flower with an every day compact floro...theres just no since in wasting you time.....unless you are just doing it to see the life of a pot plant knowing your not gonna get very much at all...if you are growing for production and quanity and you can afford it id say go with an mh for vegg and an hps for flower....if you cant get both atleast get the hps for flowering ....my 6 would be much nicer if i had both lights ...and ill bet i would have yeild more bud in the long run if i had....PEACE