Oh, are we seriously going to do this? You *REALLY* want to go?

"show me what white LEDs emits 350lm/W. Better yet, show me one that gives half of it."

CREE |Cree Breaks 200 Lumen Per Watt Efficacy Barrier

208 lux/w, more than half of what you requested, and destroying ANY HID. And that's just in the GREEN band where lumens are weighted, that's not including red or blue emissions.

You want me to start explaining how this works, or should I just whip out the patent with my name on it?

The efficiency gain I talk about is TOTALLY dependent upon the crop. For cannabis, you'll never hit 95%, but I can hit it with all sorts of fodder grasses and other vegetative crops. I can grow those WITHOUT LIGHT AT ALL, basically making the system only dependent upon power for the nutrient reservoir and temp control.

As stated above, lumens is measured at 555nm. That's not taking the ENTIRE irradiant flux, which from monochromatic diodes can WELL EXCEED 300 irradiant lux/w. The blue diodes ALONE are doing that, as that's what the Cree white is based from.

I think you should spend 3-4 years on Candlepower and learn, and even then you'd still be 100 years too young to try me. Even the usage of LED for horticulture is so beyond them that they're not qualified to discuss it.

Now pardon me while I finish inventing a 300w single-package diode with totally passive cooling. South Korea LOVES me right now. Seoul Semiconductor is almost falling over themselves with my new diode design.

Maximum theoretical output is ~683 irradiant lumens per watt, FYI. Monochromatic LEDs are EASILY past the halfway mark.