1000Par or Run lights at full strength??

In early flower should i run my lights at full strength(ROI-E720s) and raise them up to hit 900-1000 par or keep low and hit Par?
what week in flower should lights at full strength and when/if would you phase them lower?

I run mine at full, or 85%+ ish

And adust my plants as needed

EDIT
I use QB lights

OSBuds said:

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Good chart - I have not came across that yet.

PPM at 1500 is def top end of diminishing returns on co2 imo
and
80-85 for late flower seems a little warm too - for a few reasons.

Would i be reading this right for my original question? IE: Turn lights to 720w and pull them to 2ft to get 800 par?
that result in more photons reaching the canopy instead of running them at 1ft @ 65%max watts to get the 800 par?

or is 800 par 800 par no matter how many watts are used to reach that?

"is 800 par 800 par no matter how many watts are used to reach that? "
yes, it is.

Jhef said:

80-85 for late flower seems a little warm too - for a few reasons.

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guessing the chart was made with leds in mind 80-85 is perfect for led (given you have good air flow)

cobshopgrow said:

"is 800 par 800 par no matter how many watts are used to reach that? "
yes, it is.

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So if i ran lights at 65% and hit par instead of 100% and hitting par, would i save power without sacrificing yields?

that should be the case.
if were speaking of going closer with the light, you need to consider that the well lit area is going to be smaller if only at 65%, as long this fits you should be fine.