Guy
the simple cheap answer ................u want a few Spotlight plant bulbs........if u look on the box it is 2700k light waves
by adding those u will increase the yeild by maybe 1/3 but u are also increasing the heat by 5x ............so u need to rig up a cooling system with fans to keep the plant from getting heat stressed
http://www.homedepot.com/p/Philips-120-Watt-BR40-Agro-Flood-Plant-Light-Bulb-415307/202768441
that light 4 of them
http://www.homedepot.com/p/HDX-150-Watt-Incandescent-Clamp-Light-CE-300PDQ/100354511
that socket/ clip on (it is matched to keep u from setting fires)
now u need a tape measure and find out how tall the plant is (overall planter included) a t5 is good for about 1 foot (this includes the 8 to 10 inches distance between the light and plant top cola...................u find that point on the plant and then angle the clip on lights to hit there from the 4 coners
your feed u need to alter it your bloom add 2 more mls to the feed and watch the plant the very tips of the plant should get a burn look if no burn look up it 2mls again when u see the burn look reduce it by 1 ml and hold that feeding .................between that and the lights hitting it correctly i will stake my left nut on u wil pull 2 times what u got last time if not 3
edit.............oh to make them work u power strip them all on one strip but the strip is pluged into a 2nd outlet (not the one the t5 is plugged into) then it just get a timer with in a few mins so one kicks on other is few mins later (they do not need to be perfectly matched)