"(How 'bout your light DH?
Had enought time to compare it to your HPS grow yet?)
DH?..huh?"

Sorry, that was an aside to DH, (DreadedHermie).
He built an array of 6. 15 W. 660nm. and 2. 15W blue Ledengin emitters and replaced his HPS with it.
It's been in service longer than my new array has.

"But the heat is still created and still needs to be removed. (I never quit?.do I). Don??t get me wrong?You be da?? man.

Denied! I be da t90 'zard.
Bein' "da man" is too much like work.

If the UFO??s are even close to equal to 600W Hid??s , then I don??t really need that much light. 600 X 2 + 250 1450 watts in 12 ½ sq ft.

Apples n Oranges, brah.

That??s only 116 watts per sq ft. You can see that I haven??t completely given up on smaller flanking Led??s. If there was a quality Led in the 50W range (at a reasonable price) I??d still be considering that option.

You can DIY a 65W. light from off-the-shelf parts if you wish.
It is easier than it looks.

Can you have too much light?"

Yes!
Noon sun in Hawaii exceeds 91k lux.
At about 91k., (solar spectrum of cuss), photosynthesis stops and plants stop growing.
Kick it up a notch and leaves will "bleach" and reject/reflect all light.
From 2" away the 15W. emitters will give ya white polka-dots on yer top leaves

Now, I'll go rummage about on "da bay", for an honest UFO dealer.
Where'd I put that Diagones lamp? Aha! Here 'tis.

Be back wiki wiki, (with any luck).
Weeze.