After reading for hours I’m even more confused with DLI. All help appreciated.

[Cameron2231]

My uneducated argument is:
Imagine a Christmas tree shape plant, measure PPFD right at the peak and do the calculations that way but that doesn’t mean that the ENTIRE plant gets that DLI does it? Since the lower branches will be obviously lower PPFD specially if indoors using fixed lights and not moving lights.

Someone shed some light?

The way I would think in my uneducated mind:

Measure the PPFD at the center and at least at 4 more points in a cross pattern + for the uppermost branches at least and add it all. Then do the calculations for the DLI received by the ENTIRE plant.

We can’t assume the lower branches get the same 1000 PPFD the “peak” gets.

Lower branches could be at 500 PPFD being “lower” maybe partially shaded etc.

All help appreciated. Thanks in advance.

Ah and extra points to those explaining it at a toddler level

 

[Zill]

If you are moving your operation to an outdoor garden this is sort of moot. Isn’t it?

 

[Cameron2231]

If you are moving your operation to an outdoor garden this is sort of moot. Isn’t it?

Not moving it outdoors, I was trying to explain it in a different light per se.

So far I’ve got that I’m supposed to work out an average of the ppfd, not add it all up then work out the dli.
That was my mistake, I think.

 

[Zill]

Whoops, sorry Cameron.

If I grew indoors I would not increase the main overhead light bank to get more energy into the canopy. Instead I would consider side lighting the bush with the same light output as the main light bank.

 

[2Water]

not to sound like a dick, but do you know what PPFD stands for and how it's calculated? It is by meters squared, so you can take measures within the square meter and average what said plant is totally receiving.

 

[BuffNuts]

Get off the pot websites and the confusion goes away. Want to learn about water? Go to a pool forum. Want to learn about plants? Go to a plant forum. Want to learn about light go a light forum. Want to learn about weed go anywhere but a weed forum.

 

[ACSippi]

Get off the pot websites and the confusion goes away. Want to learn about water? Go to a pool forum. Want to learn about plants? Go to a plant forum. Want to learn about light go a light forum. Want to learn about weed go anywhere but a weed forum.

STOP TELLING SECRETS!!!