side lighting

I usually top my indicas to keep low and always develop a massive canopy.
Whats the minimum lighting requirements that would be effective on those lower buds and is it even worth it ? Im running 250hps over two plants in
a 4x4 mylar lined closet,can I improve that without adding much heat?:hippy:

These big CFL bulbs would work nicely, and not too much heat. Compact Fluorescent CFL Grow Light Bulbs: Express Light Bulbs

Thanks, thats kinda what I had in mind,Im not sure if I want to bother
until I know the increase in yield is worth the extra electricity and trouble of
wiring it .:smokin: