Quote Originally Posted by mafia819
Hi,

I was wondering if the green light bulb 23W PAR 38 is any good for maintenance in the dark cycle?

Ty
The bulb I use is a Sylvania A19 Transparent Green 25 watt light bulb Cost a few dollars from Lowes. I assume HD has them too

The plant does not see Green light so you are safe using a true Green bulb. When you use CO² during the light cycle it's not safe to enter the room during the light cycle. Thus you need to do your maintenance in the dark period so you use Green light. I have use green bulbs for many years and I have great grows with large heavy colas. You just need to make sure when you open the door that the room light is not on outside the door.

If that 23w bulb is a true green bulb and not just a clear bulb with a green coating then yes it's fine.