Can greenlight be used during flower to enter the room and if so what specific kind?
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I don’t trust any light, black lights can damage your eyes with UV even though they appear less intense, I’m guessing green light isn’t as pure as you think it may be. Lights out until morning is the best policy.
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I was having humidity problems due to the rain I thought bcuz i have a dehumidifier hooked to a hose 4 continuous drain but without realising it kicked off bcuz it was full. Went in with green light. Light doesn’t even register as light on my light meter. Idk Hopefully all is well. The humidity was 70% with temperatures at 63* lights out 7th week in flower they should have benn 40% hum and 63*
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That was happening for TWO days
If you use very low intensity green light for short period of time you shouldn’t have any issue. I wouldn’t push it though. If it were me I’d figure out why dehumidifier wasn’t draining and empty it right before lights out until you do.
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NVGs and super low level green light… 
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@dbrn32 thanks. I will definitely check it 4 now on.
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NVG sounds like a good idea
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I used a green headlight last grow with no issues during flowering.
Up to you but if needed for some reason while lights out gives you the option to deal with things and be able to see.
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What type of green light did you use, I’m trying to we’re out the type I need so room is like a photographers dark room, so I can work without interruption of dark period. Cheers Dan