New Grower When do I switch lights??

[JameFlame]

Hello everyone. I have been growing Gorilla Glue fast bud from herbies seeds. It's been about 11 days under a single T5. My question is when do I increase my lighting? I have a 600wt HPS in a 2x4x6. The seed pack said 8 to 9 weeks from seed to harvest. Its going on two weeks under the t5. Any suggestions on when to move into the 600wt tent? Thxs in advance.

 

[Passel]

Switch to HPS as soon as you have level 3 leaves. If you don`t have dimmer (they won`t need all 600w in the beginning), make sure you don`t set your light too low and burn plants.

 

[ForestAutoFlower]

Like Passel mentioned, when you introduce the HPS, keep it at a good distance, and then slowly bring it in closer as the plants get stronger and larger

 

[Toppsy7]

I've got the same dilemma, have you switched to you 600?

 

[St. Tom]

these helped me out they are a great reference i popped my last lot under my hps at about 14days just dont put it to close and you will be golden i have 3 seedlings under my 125w Blue Veg Propagation CFL there 5 days old so maybe 9 or so days if they look healthy under my 600w hps