Haven't updated - haven't been doing much besides my food crops.

I thought I'd share some intensity information I had managed to collect before I was robbed a while back.

Awhile back I needed to figure out the umol output from HID lamps. I only managed to get data from a 1,000w HPS.

The HPS registers the edge of sunlight intensity (2,000 umol) inside of a hood at about 18" away.

150w LED hits that same edge about 9 inches away.

So, assuming everything is done properly, in theory, 300w LED *SHOULD* be equivalent to a 1000w HPS.

We likely have to wait a few more years for some of the newer tech to mature and produce even higher photon flux densities.

Just remember this - cannabis burns around 4,000 umol. Wherever that 2,000 umol range is, cut that in half - that's your maximum recomended height. For example, 150w hits 2,000 at 9 inches, 4.5 inches, it's 4,000 umol.

LEDs can and WILL burn your plants!
khyberkitsune Reviewed by khyberkitsune on . LED Ahoy! Okay, this becomes my new official grow journal. There's still the krusty/DWC update, but that stuff is going to be hash. pH swings like mad and heat issues from poorly-ventilated spaces caused that to be a complete cockup. The gear: 1 new prototype 50w quad-band+4500K white LED, combo 120/90 degrees. 1 Current-gen 50w tri-band solar-insolation spec LED, fully 120 degrees. 1 current-gen 120w tri-band solar-insolation spec LED, fully 120 degrees. The 120w gets my two largest mothers, Rating: 5