I'd be curious to see the difference in efficiency. To test..
Build a 3 or 4 cubic foot box from 2" xps, whichever size fits both your lights, and seal corners with silver hvac tape. Put your light inside with a thermometer and cut a small notch for the cord. Put another piece of xps on top and seal it with silver hvac tape air tight.
Everything must be room temp, also, write down the room temp.
Turn the light on for an hour with a Watt meter and quickly open the box and check the temp. The rise in heat before and after can be converted into btus which can be converted into watts which will show how efficient your light is at producing light, yes?
The max loss of btus through the box if it hypothetically was instantly at max temp and held steady would be sqft of internal box times the temperature difference between the box and room then divide by 10 since that's the r value of the xps.
You can then both compare the Watt usage to the heat created, yes? Then see the difference in how much light you make vs.
How much heat you make for how many watts you use.
I hypothesize you will both show the same efficiency in watts used vs. Heat. This is because light is energy and energy can't be created or destroyed, it can only change form, after changing to light the light will change back to heat and leave the box through the walls over time since no insulation is perfect.
So, now that I took your brains through a reverse physics class let's not try and use heat alone to gauge efficiency. Even if your light is more efficient if the distribution over your canopy isn't it's all for nothing. Many smaller cheap Chinese LEDs will win in a scrog vs. A more efficient big led if the efficiencies are even close since the larger more expensive led will lose more light to heat as the plants can't utilize it's light. To my knowledge no led can grow trees efficiently.
Now, put your bongs down and go get a PAR meter and stop using lumens then you can compare light efficiency but one big expensive led may provide too much light to a small space and therefore be less efficient regardless of diodes or bins, there is a point of diminished returns here and it also depends on your environment including temp, co2, medium, nutes, etc.... Not just your lighting.
