Calculating Grams per Watt with LED

[WizardsNThings]

Couldn't find much about this after Google searching. Is G/w with an LED fixture calculated with draw power, or rated power.

My viparspectra is 450W, 200W draw. My last grow had a 4 week veg, and I got 53.03g which is fine, but more would be better (gonna do a longer veg). I also harvested pretty early for a buzzy high. So my g/w is either .11, or .27. Pretty different so just wondering. I figured it is the rated power.

 

[Spidermite]

You can go by actual watts pulled from the wall. Running two of your lights uve gotten a best of a bit over 500 grams dry

 

[gbauto]

Honestly, when I was running a blurple fixture 1g/watt of actual power consumption was the goal. My last yield using current tech led's netted me over 2g/watt.
Focus on improving your techniques and better yields will come.

 

[Sheesh]

I think it's actual power draw at the wall.

 

[MJTECH]

Couldn't find much about this after Google searching. Is G/w with an LED fixture calculated with draw power, or rated power.

My viparspectra is 450W, 200W draw. My last grow had a 4 week veg, and I got 53.03g which is fine, but more would be better (gonna do a longer veg). I also harvested pretty early for a buzzy high. So my g/w is either .11, or .27. Pretty different so just wondering. I figured it is the rated power.

Locate the ratings on the nameplate, multiply rated amperage by voltage (commonly 120 volts) and you have wattage.

Example 1.2 amps at 120 volts = 144 watts.

 

[Spidermite]

If your getting 2g a watt you must have a tall space to work in. Id love to see 2g a watt grow. Join in the auto grow off. This spring summer we are doing photos autos and outside.