Should I use lenses?

I plan on a 30x36",(3)5.886" x30" heatsinks,3 3590s on each, for a 4x4 space. I'll be running at 58 watts per cob so about 2sqft each). Each 3 own driver 120-1400b. If I use 80degree lenses, will I be able to get light all over at 16-20" above canopy?

There is a nice lens or reflector thread in the led section. Some use none.

Reflectors are easier to install and removable too.
https://www.rollitup.org/t/lens-and-reflector-optics-for-cob.893660/

Lenses can be removed. Just take out 2 screws that hold on the metal collar. (don't think you need all 4 to hold it on)