Thesolarguy512
Active Member
I have a total height of 6ft6in to play with do i have to stage for different time frames in cycle or can i set them all at one height in the room?
Does height above plants really matter with LED?
- Thread starter Thesolarguy512
- Start date
Hugo Phurst
Well-Known Member
I have my lights at maximum height & adjust intensity accordingly.
Got a lux meter? They're inexpensive.
Clone and seedling: 5,000–7,000 lux
Vegetative stage: 15,000–50,000 lux
Flowering stage: 45,000–65,000 lux
Have fun
Got a lux meter? They're inexpensive.
Clone and seedling: 5,000–7,000 lux
Vegetative stage: 15,000–50,000 lux
Flowering stage: 45,000–65,000 lux
Have fun
Prawn Connery
Well-Known Member
Depends on the light. You can hang the sdame height and dim up and down, or raise and lower the light, but some designs are better suited to being closer to plants, usually the lower powered bar lights.
Lux meters are only useful to compare the intensity of the same light or group of lights, as Lux will vary from one spectra to the next. For example, LED's with more green and blue will have a higher Lux than those with more red, as Lux is based on lumens, not PAR, and lumens aere weighted more heavily in the green and blue regions than the red regions
Grower1974
Member
Use a PPFD meter. Height/wattage and dimmer % mean nothing without actual data.
Hugo Phurst
Well-Known Member
the reason I said lux meter, It's good for setting a general light level.
and it's $20 vs $200 (or more) for a ppfd
and it's $20 vs $200 (or more) for a ppfd
Grower1974
Member
The Photone App works amazingly well.
Hugo Phurst
Well-Known Member
Grower1974
Member
LOL! I just got progressive lenses myself! They are amazing.
Smokenpassout
Well-Known Member
Run led light suspended over about 18” in veg @60-70% intensity, then lower is to 13” in flower and raise intensity between 80-90% Yes Leds can damage plant tissue severly. Leaves are clear indictors of light strength.
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Prawn Connery
Well-Known Member
Which light and grow area are you talking about? You can't make blanket statements about hang heights until you know the light intensity, layout and canopy coverage. Just sayin'