led .cob .tent . philizon

Hello, I know 1watt led = 3.4 BTUs so, I have question if use cobs with water cooling, Are BTUs for watt'll change? and how can I calculate heat Resulting from the energy of photons on the planting? something like this: https://www.rollitup.org/t/water-cooled-cobs.909674/

https://www.amazon.com/gp/product/B083BRJNY4/ref=ox_sc_act_title_1?smid=AH440WDUIAWYA&psc=1 Couldn't find any reviews of these but they sound awesome. Looking at getting a new light. This sounds like a good deal with a coupon on amazon too. Anyone know how this compares to Mars Hydro or other...