You can improve the light penertration issue, to some degree.

I replaced 2- 400watt MH's in my mother room with 2- Procyon 100's. By putting them together on a light rail it improvered some, simply by changing the "angle of attack" of the light constantly. Gained even more by adding a down facing fan between them, now as lights move over the mom's, top leaf growth blows around and lower leafs see more light, just like nature. My mom's seem happy and are short (kept to aboout 3 ft) and fat (phat?).

I'm not really sure if 100w of LED equals 400w HPS; I think 100w of LED my be as good as 400w MH, at least in the Procyon.

The Smartlamps have abt 300watts and they only claim a 600w HPS equal. I feel this might be a more reasonable claim but we will see.

The more LED's are used the better they will become.....and like most electronics, the prices will drop. I remember my first H/P scientific calc cost almost $500- in abt 1970, what are they today?