Which led gave you less yield? Did you use the cheap blurples or quality led? Good led yields a comparable amount more than hid..
Hids have a higher footprint amount ...........where a 800w led does a 4x4 a 1000w hid will do a 5x5
then u need to account for the lens angle ........120 is about the same as hid ........90 is the standard Led lens where u get the 4x4 but several more inches of penetration compared to Hids ....... 60 small foot print but depth u can grow grass under the plant (that strong in penetration)
i used 3 brands
apollo ........cheap brand all in one (great light for price used for side lights to increase oil weight but keep heat down)
led zeal ......ordered strait from makers got a great price on it the unit is call Matrix S....programmable( veg flower UVB) light patterns built in timer and daisy chain able (sold those to buddy using them now with great results back in the black after the 2nd grow) he had pay for the extra hydro gear other wise back in 1 grow
platinum.....nice light they are the 90 day free return the light paid for itself the first grow .......one thing i dislike is the fans suck air from the top and blow down and out the sides of the unit i would of liked it to suck in from the sides and dumped up top
the only way a LED can 100% match a Hid yield amount is if the LED light is over powered say replace a 1000w with a 1500w (actual 800 w).....it is the only way to make up for the footprint lost