Have a look at this

[Waira]

...drop to 20/4, 24/0 is a waste of time unless you have all the other potential limiting factors eliminated,... plants can only use so much light, much the same as nutes, and not all respond favorably to such forced light hours,... yield improvement is isn't usually worth it either, not for the added cost and wear & tear...
Check out the Myth Busters section, there's a great thread on this there, and some good info to ponder!

 

[Bigbryantn]

Temps go wetween 20 - 35 depending on the weather.

She gets 24 hours of light.

I have moved the light up to 600mm and taken the calmag up a notch for her.

We will see how it pans out.

Thanks for all of the advice guys.

View attachment 1202895

I take it that is an air cooled hood?