GrowLightResearch
Well-Known Member
1000W is more than what you need. You do not need to use all those watts all the time.
Cree showed they can generate the equivalent of a 1000W HPS with a 550 watt fixture.
In their comparison the HPS was at 39" and the Cree fixture was at 59".
PPFD in rounded numbers are about 400 in the center and 300 at the edges
But the intensity at the top of the canopy does not tell the whole story.
Now the hypothesis. This is an idea I'm playing with currently.
The following image shows the PPFD beneath the top of the canopy based on the PPFD at the top.
We should not only care what the PPFD is at the canopy top but also deeper.
You can raise the height of that 1000 watts and spread the light deeper.
No matter the height, the photons have to go somewhere, why not deeper?
When the plants are smaller you can turn down the current on the driver.
Source: www.growlightresearch.com/ppfd/depth.php
Cree showed they can generate the equivalent of a 1000W HPS with a 550 watt fixture.
In their comparison the HPS was at 39" and the Cree fixture was at 59".
PPFD in rounded numbers are about 400 in the center and 300 at the edges
But the intensity at the top of the canopy does not tell the whole story.
Now the hypothesis. This is an idea I'm playing with currently.
The following image shows the PPFD beneath the top of the canopy based on the PPFD at the top.
We should not only care what the PPFD is at the canopy top but also deeper.
You can raise the height of that 1000 watts and spread the light deeper.
No matter the height, the photons have to go somewhere, why not deeper?
When the plants are smaller you can turn down the current on the driver.
Source: www.growlightresearch.com/ppfd/depth.php