what kind of light are you using? you only said its 150w... but of what type?

if its incadescent... at least replace the bulb with a CFL, incadescent is basically worthless for cannabis.

if its already a CFL, 2'4" is WAAAY too far, it should be like 1-4" away depending on how much heat it puts out.

if its a HPS/MH, thats probably still a little on the far side... with HPS/MH you use the 'hand test' put your hand at the top of the plant and move the light close enough that your hand is still comfortable (heat wise), and then back off a couple inches
syde00 Reviewed by syde00 on . First Timer- What am I doing? *Pics I'm a TOTAL n00bie... Have whats looking like a female (as far as I can tell.) 6 weeks old, 11 inches tall. Lower leaves are yellow tipped, upper leaves look OK. Never "topped/trimmed" ... on it's eighth set of leaves. What now? Do I trigger "flowering"? Am I impatient? Am I doing something wrong / wasting my time? Please have a peek and give a 'first-timer' some comment. Do things look alright at first glance? Any comments appreciated, be they brutally honest (negative) or positive... as Rating: 5