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:peace: ...and nothing else ! To measure radiant power is a complicate and expensive thing. And it is not always granted to receive perfectly calibrated results. So why shouldn`t we measure the heat power directly with a US$ 20,- equipment to get even more accurates results ? I know the...

:peace: ... is to measure the heat power ! In a watercooled led light this is very simple. You only have to measure: If, Vf, water temp., wheight of the water and time. Many different led chips(CREE, CITIZEN,... and others) were tested by myself to proof the amount of heat power...

:peace: Sorry man - but I can`t agree I measured heat production many times with different chips - and heat power was always P = ~ 0,75 * Vf * If (CREE and Osram agree in that) you talk about luminous efficiency, which is different from energy efficiency...

:mrgreen: Yes she`s a good, cheap "bitch of a kit", that you can use in front and behind at the same time :mrgreen::rolleyes:

:peace: Yes huuh - hard to understand, so I`m not shure if that answered what you expected. What is your mothers`language ??? Did you tried "google translate" ?

:peace: I like these cobs since years, even if luminous efficiency is low(70-85lm / w). I growed several times with this spectrum, and had no problems to veg. "and" flower with the same chip. In the picture above I try to close the spectral gaps, wich always exist in the spectrum of white...

:peace: a watercooled one seems to be champion in energy efficiency and lowest junction temp. :peace: US$ 10,- / 3ft = 30 pcs CXA - if you want 3000W - no problem :confused::eyesmoke:

:peace: this is a grow room with only 3 ft headroom - as you can see - every inch counts ! And there is no space for tall heat sink, wich need air convection to work well. A small water pump (3 watt ) can transport 80% of your heat to outside of the grow room. Silent and more secret as it...

:peace: Sorry - but the heat in (my) watercooled led light system goes to the heatexchanger - and from there to the shower, kitchen or any other usage like swimmingpool,fish tank...... and normally leave the house in a water pipe. :fire:

:peace: A watercooled led light must be the best for your country - can also be used as a water heater, if you integrate a heatexchanger. :eyesmoke::shock:

:peace: Hi brother - you should buy a power meter and make shure to drive out a min. of 1200-1500 real watt for your space(6,5 x 6,5) ~75% of your "real" power will be transformed into heat. Watercooled led light is the most efficient way to manage heat production. I can take hot showers...

yes - but prohibition is organized by little, disgusting devils called poltiticians :dunce:

:peace: Hi brothers - It`s always a good idea to produce your own electricity, specially if you need a lot. So proof your possibilities to install wind or pv-power. With 6 x 600W you will produce a min. of 2700W heat power. Would be enough for heating and hot water and weed for 6 persons in a 9...

:peace: OK. - but what`s wrong with half prices ?? o_O:rolleyes:

:peace: I found those boards as an interesting alternative... http://www.lumen-laden.de/products/quad-board-400-leds-smd5730-200w/ with an other led smd5730 type - only few lumens of difference and lower Vf. :eyesmoke:

:peace: You are right - when I said "advertising" I was thinking more in promotion of DIY watercooled led light as an option, for the many people here on RIU, who want to diy with this new (or conventional) concepts. It is much easier to make a decison towards watercooled led, if they...

Let`s do some advertising :?:?

:peace: Only rubber boots with short trousers can beat that ! :o:shock:o_O

with 2 x HLG240h I`d have enough power and less heat - with 600W you are @ max. of your heatsink. Better for light efficiency and heat management is to use more boards (6?)

:peace: For wires in series I would buy HLG-240H-C1050A for paralell wires like the hlg kit they use HLG-240H-C2100A. but never drive a single board - as the max. current is 1600mA. Have a look to different mean well drivers ! :eyesmoke: but 240W for 3 x 3 is sufficient if you bring...