Its not the lumen's issue at all. You need to get the lights closer to the plant. The closer the light is the tighter/bushier the plant will grow. If you continue to let them stretch out growing, the stems will collapse and they will simply fall over and die. They are ridic stretched.

Do you have a fan placed on them currently?

If your finger isn't burnt by the lights the plant leaves won't either as a rule of thumb, the plants are very resistant.

Lastly I'd say if you want to know how my CFL/Floro grow ended up check this out.

http://boards.cannabis.com/grow-log/...g-you-kid.html
KL4D4 Reviewed by KL4D4 on . First grow, 2weeks Hi, the attached pic is of my plants, they are about two weeks old at the moment, please could u give any bad points that you can see, that i wil be able to improve on. thanks in advance.:) Rating: 5