Is it possible......

**The Lost Soul** · 10-06-17, 01:03 PM

.....to give varying levels of light to the plants throughout the flowering stage?
I have a 600w digital/dimmable/switchable ballast and would like to know if I can switch between settings/bulbs without stressing the plants out....
TLS

SCOTLAND V ENGLAND 3pm

farmguy · 10-06-17, 01:17 PM

Not sure on wat u mean really
But i would run 1 400w mh bulb for veg then first 2 week flower then i add another 400w an have them on hps bulbs an turn boost on the 2 400w ballasts an keep it like that till harvest

Atb

**The Lost Soul** · 10-06-17, 01:23 PM

I mean, I'm running 400w from the ballast just now but there are times when the ambient temp around the grow space will be low enough to pump the ballast up to 600w....so, do you think this will stress the plants?
TLS

**Blue** · 10-06-17, 01:26 PM

Yes you can switch between settings if it's to keep your temps within range, Itl cause no problems but obviously the higher the watts the better the results that's if you can control the temperature on its highest setting.

**The Lost Soul** · 10-06-17, 01:36 PM

Good man, Blue. Thank you for clearing that up. Controlling the temps is no probs when the ambient temp is right so I'll be pumping it up to 600w whenever possible.
My mate grows and he thought that the change would stress/hermit the plants out but he's self taught and doesn't have the means to switch between light strengths.
Tried telling him about THCTalk but it's fallen on deaf ears.
Ever since 2009 when I joined, this is the only site I've ever used and will be the only site I ever use. The info/help you get from proper accomplished growers is invaluable to me. You've got to be open minded in order to learn anything..
TLS

**Blue** · 10-06-17, 01:45 PM

Originally Posted by The Lost Soul

Good man, Blue. Thank you for clearing that up. Controlling the temps is no probs when the ambient temp is right so I'll be pumping it up to 600w whenever possible.
My mate grows and he thought that the change would stress/hermit the plants out but he's self taught and doesn't have the means to switch between light strengths.
Tried telling him about THCTalk but it's fallen on deaf ears.
Ever since 2009 when I joined, this is the only site I've ever used and will be the only site I ever use. The info/help you get from proper accomplished growers is invaluable to me. You've got to be open minded in order to learn anything..
TLS

The only way a change in light would stress the plants would be to alter the colour spectrum. So if your switching from a duel spec or hps mid flower to a blue spectrum MH bulb then yes the plants will become stressed. Another one would be to crank up your current light to its maximum setting and not keep the temps within range.

I will point out though, that if your dimming your current 600 bulb then dim no further than 400w and bare in mind dimming regular will reduce the bulbs life span. If your wanting to dim to 250w then changing the bulb to 250w would be a better option.