How much far red 730nm do i need?
- Thread starter vhawk
- Start date
Kingrow1
Well-Known Member
Youll find it in a lot of bulbs if you check their spectrum at the 730 range. That should be enough but if your looking for a quicker turn around buy a more dedicated far red light and time it to come on for the last 15mins of light period or for 15 mins after your lights turn off. Should be plenty more info on google.
vhawk
Well-Known Member
I want the quicker turn around. What I need to know is how many watts I need or whatever measurement for that size grow tent
Kingrow1
Well-Known Member
Thats hard for me to reference but most info points to not needing much or for a very long duration. Im not sure there is a min max wattage/lumens for far red only that it is the last light the photoreceptors recieve.
Assume that a dimmer source will need more time to be effective and visa versa. Sorry i cant give wattages etc but there will be some threads around where its been attempted.
Assume that a dimmer source will need more time to be effective and visa versa. Sorry i cant give wattages etc but there will be some threads around where its been attempted.
GroErr
Well-Known Member
Good question there isn't much to go on for reference. I use it in my room and a 40w 730nm bar lights up my whole room well and it's 4x9.5x7.5'. I just centered it and let the reflective walls spread it. I also use 630/660nm for 10 minutes before the lights go on (same idea Pr/Pfr on the other end of the light cycle) and 65w lights up the whole room. Just took a camshot of it yesterday before lights on. 730nm is more difficult (for our eyes) to see since it's in the infared spectrum but keep in mind that room is pitch black normally.
630/660nm, 65w
An older pic of the 730nm 40w bar after lights out...
Cheers
630/660nm, 65w
An older pic of the 730nm 40w bar after lights out...
Cheers
Last edited:
vhawk
Well-Known Member
Perfect. Where did you get your light bar if you don't mind me asking? And thanks for being helpful. I like it when I get useful answers. It's a rare thing sometimesGood question there isn't much to go on for reference. I use it in my room and a 40w 730nm bar lights up my whole room well and it's 4x9.5x7.5'. I just centered it and let the reflective walls spread it. I also use 630/660nm for 10 minutes before the lights go on (same idea Pr/Pfr on the other end of the light cycle) and 65w lights up the whole room. Just took a camshot of it yesterday before lights on. 730nm is more difficult (for our eyes) to see since it's in the infared spectrum but keep in mind that room is pitch black normally.
630/660nm, 65w
View attachment 3738738
An older pic of the 730nm 40w bar after lights out...
View attachment 3738747
Cheers