Looking nice and healthy, Tito !
Wasted energy means that the plant will be putting time and energy into lower buds, that will end up "popcorn" buds.
Reason is, they are too far away from "usable" light.
For instance, if a person is using a 400W HPS, anything 24 inches below the light bulb is NOT getting an adequate light supply for dense, fat buds.
It's called The Inverse Square Law..............check it out:
The law states light intensity changes in inverse proportion to the SQUARE of the distance
I=L/D2
Intensity = Light Output / Distance 2(squared)
400W HPS at 50,000 lumen:
50,000 lumen = 50,000/1 or 1 foot away from bulb
12,500 lumen = 50,000/4 or 2 feet away from bulb
5,555 lumen = 50,000/9 or 3 feet away from bulb
3,571 lumen = 50,000/16 or 4 feet from bulb
As you can see, anything more than 2 feet MAX, is a waste of time and energy
The Sun gives off 10,000 lumen per square foot on a normal day, so why give your plants less than that too
For a 600W, it means beyond 3 feet is a waste
For a 1000W, it means beyond 4 feet is a waste
Now there are ppl that go beyond these limits with some success
But if they follow the Inverse Square Law, they will reap MORE BIGGER BUDS AS COLAS w/ NO POPCORN BUDS BELOW