Totally agree hereYou assume the given numbers are correct, from my sources it's clear the spider numbers are wrong, no doubt.
A 400w hps emits 700+ umols and with a reflector in a square meter you get around 600-650 umols.
I don't believe for a second the spider numbers are real.
Is this the spider light?
http://www.twilightgroups.com/show-product-140-387.html
The specs say less than 2000 lumens, no mention of par photons.
Each cob is 615umol. So a 50w is that. The 200w is that x 4 as it has 4 cobs
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