Around 95+% of the light also turns into heat as well. Some is carried away as humidity from transperation. Almost all energy in ends up as heat in the end.
That being said if you can reach your desired light level with lower energy in then you have improved system efficiency.
Hmm, Well maybe its just me then, On my next 2 lights ill see if it holds the room at the same temperature. It just doesnt seem accurate that the Heat Watts generated are not the total amount of heat. Because if thats accurate then it doesnt matter if you run your LEDs at 100% or at 35% you will generate the same proportion of heat based on watts. If you go by heat watts generated and calculate that to BTU thats how I can to the conclusion that 3000W is the same BTU output as a 1000W DE Gavita
CXB3590DB36V4000K 16 COBS @1.4A ON 5.88 PROFILE HEATSINK
16 SQ.FT. CANOPY 94% EFFICIENT DRIVER @15 CENTS PER KWH
Total power watts at the wall: 831.91
Cobs power watts: 782
Total voltage forward: 558
Total lumens: 154163
Total PAR watts assuming 10% loss: 430
Total PPF: 1947.9
PPFD based on canopy area: 1310.44
PAR watts per sq.ft.: 26.88
Cob efficiency: 61.03%
Power watts per sq.ft.: 48.88
Voltage forward per cob: 34.89
Lumens per watt: 197.14
Heatsink riser thickness / number of fins / fin's length: 0.27in/14/1.0in
Heatsink area per inch: 260.01 cm^2
Total heat watts: 305
umol/s/W / CRI: 4.53 / 70CRI
Heatsink length passive cooling @120cm^2/heatwatt: 141 inches
Heatsink length active cooling @40cm^2/heatwatt: 47 inches
COB cost dollar per PAR watt: $1.87
Electric cost
@12/12 in 30 days: $45.42
Electric cost @18/6 in 30 days: $67.88
Cost per cob: $50.17
Heatsink cost per inch cut: $1.74
Total cobs cost: $803
Total heatsink passive cooling cost: $245
Total heatsink active cooling cost: $81
