audiophilepj
Member
I upgraded my grow space to support a Veg and Flower room last Dec. My dilemma was my power bill. My bill jumped about $50 a month when growing. With the addition of another light, it was to increase even more. I was using a 1000 watt HID. After a few google searches, I came across Growmau5's youtube videos.... and I decided to jump into DIY LED.
Heatsink from heatsinkusa, cobs from Jerry at Alibaba. Ace Hardware, Amazon and RadioShack for everything else.
Veg light info from bggrass's calculator (which rocks!)
CXB3590 4-5000K 1-6500K = 5 COBS @1.4A ON 12 PROFILE HEATSINK
6 SQ.FT. CANOPY 94% EFFICIENT DRIVER @5 CENTS PER KWH
Total power watts at the wall: 259.57
Cobs power watts: 244
Total voltage forward: 174
Total lumens: 51665
Total PAR watts assuming 10% loss: 144
Total PPF: 643.68
PPFD based on canopy area: 1147.9
PAR watts per sq. ft.: 24.0
Cob efficiency: 65.35%
Power watts per sq. ft.: 40.67
Voltage forward per cob: 34.89
Lumens per watt: 211.74
Heatsink riser thickness / number of fins / fin's length: 0.3in/31/1.0in
Heatsink area per inch: 558.7 cm^2
Total heat watts: 85
umol/s/W / CRI: 4.47 / 70CRI
Heatsink length passive cooling @120cm^2/heatwatt: 18 inches
Electric cost @18/6 in 30 days: $7.51
Flower light
CXB3590 6-3000K 2-4000K = 8 COBS @1.4A ON 12 PROFILE HEATSINK
10 SQ.FT. CANOPY 94% EFFICIENT DRIVER @5 CENTS PER KWH
Total power watts at the wall: 415.96
Cobs power watts: 391
Total voltage forward: 279
Total lumens: 71373
Total PAR watts assuming 10% loss: 198
Total PPF: 920.7
PPFD based on canopy area: 985.15
PAR watts per sq. ft.: 19.8
Cob efficiency: 56.34%
Power watts per sq. ft.: 39.1
Voltage forward per cob: 34.89
Lumens per watt: 182.54
Heatsink riser thickness / number of fins / fin's length: 0.3in/31/1.0in
Heatsink area per inch: 558.7 cm^2
Total heat watts: 171
umol/s/W / CRI: 4.65 / Estimated
Heatsink length passive cooling @120cm^2/heatwatt: 37 inches
Electric cost @12/12 in 30 days: $7.99
It was a fun successful project. I am actually saving on power and running cooler. I can't thank Growmau5 enough for the massive amount of time he has contributed to the forum.
It should pay for itself in about 4 years
Heatsink from heatsinkusa, cobs from Jerry at Alibaba. Ace Hardware, Amazon and RadioShack for everything else.
Veg light info from bggrass's calculator (which rocks!)
CXB3590 4-5000K 1-6500K = 5 COBS @1.4A ON 12 PROFILE HEATSINK
6 SQ.FT. CANOPY 94% EFFICIENT DRIVER @5 CENTS PER KWH
Total power watts at the wall: 259.57
Cobs power watts: 244
Total voltage forward: 174
Total lumens: 51665
Total PAR watts assuming 10% loss: 144
Total PPF: 643.68
PPFD based on canopy area: 1147.9
PAR watts per sq. ft.: 24.0
Cob efficiency: 65.35%
Power watts per sq. ft.: 40.67
Voltage forward per cob: 34.89
Lumens per watt: 211.74
Heatsink riser thickness / number of fins / fin's length: 0.3in/31/1.0in
Heatsink area per inch: 558.7 cm^2
Total heat watts: 85
umol/s/W / CRI: 4.47 / 70CRI
Heatsink length passive cooling @120cm^2/heatwatt: 18 inches
Electric cost @18/6 in 30 days: $7.51
Flower light
CXB3590 6-3000K 2-4000K = 8 COBS @1.4A ON 12 PROFILE HEATSINK
10 SQ.FT. CANOPY 94% EFFICIENT DRIVER @5 CENTS PER KWH
Total power watts at the wall: 415.96
Cobs power watts: 391
Total voltage forward: 279
Total lumens: 71373
Total PAR watts assuming 10% loss: 198
Total PPF: 920.7
PPFD based on canopy area: 985.15
PAR watts per sq. ft.: 19.8
Cob efficiency: 56.34%
Power watts per sq. ft.: 39.1
Voltage forward per cob: 34.89
Lumens per watt: 182.54
Heatsink riser thickness / number of fins / fin's length: 0.3in/31/1.0in
Heatsink area per inch: 558.7 cm^2
Total heat watts: 171
umol/s/W / CRI: 4.65 / Estimated
Heatsink length passive cooling @120cm^2/heatwatt: 37 inches
Electric cost @12/12 in 30 days: $7.99
It was a fun successful project. I am actually saving on power and running cooler. I can't thank Growmau5 enough for the massive amount of time he has contributed to the forum.
It should pay for itself in about 4 years
.