I am using 4 x 20w 2700k. The LED is a Pro-Grow 260. I really like this LED light. I dont think I will ever use HPS or other hid systems.

I am thinking of upping the 2700k CFL in this grow but just during bloom. I was thinking of hooking up 6 x 85w, 2700k CFL during the bloom stage.

The 4 x 20w are keeping the tent at a nice 21-22 degrees or so. The 6 x 85w will increase the temps but I have my extractor always on. It wont be too bad on the plants. I think they will love it but I will need to water a little more often. But using LED and CFL means I water the 2 gallon buckets about once every 5 days or so... Watering isnt really an issue with LED & CFL.

You mentioned the size of your plant. All I can say is maybe your LED are poor quality or you are making a mistake in soil and feeding. The thing about growing weed is that there are many different things you could be going wrong on and this has an effect on the plants. for example I could have waited too long to repot and bound the roots... or the lights are perfect but the soil is very bad quality... there are so many variables. I would need all the info you could give me. Not just on nutes but even down to soil mixes, plant sizes, exact light types and research you did on them before buying, pot sizes, your set-up as in air intake/out-take, air movement, humidity, temperature, how often you water as so many over water, drainage, light heights and distance.

In my signature below you can follow my first grow and compare your week 4 to my week 4. But remember that my lights are different to yours.

Take care