The engineer that is somewhat helping me build my own quasi-DIY light is a little hard to get a hold of and we have a language barrier so i'm hoping you might be able to help me better understand that number in bold (below). (i.e. the number that he's multiplying times the 500W).
He's trying to explain to me why the PPF DECREASES if I double the quantity of LED chips on the board. I'm baffled, to me it seems that if I double the chip count on the board that it should increase the PPF but instead hes says it decreases it from 883.5 down to 809.5. Below is his estimated calculation of PPF.
1. LED #1AA (1,198 total chip count) = 500W*2.540 = 1,270 PPF
2. LED #2AA (624 total chip count) = 500W*1.767 = 883.5 PPF
3. LED #2AA (1,216 total chip count) = 500W*1.619 = 809.5 PPF
Notice the LED for the first row is different than rows 2 and 3. Rows 2 and 3 use the same exact LED.
What is that number in bold (1.619)? I checked his math and obviously that number in bold somehow decreases the PPF??
Here's the specs of LED #2AA. And the specs of the driver is below.
He's trying to explain to me why the PPF DECREASES if I double the quantity of LED chips on the board. I'm baffled, to me it seems that if I double the chip count on the board that it should increase the PPF but instead hes says it decreases it from 883.5 down to 809.5. Below is his estimated calculation of PPF.
1. LED #1AA (1,198 total chip count) = 500W*2.540 = 1,270 PPF
2. LED #2AA (624 total chip count) = 500W*1.767 = 883.5 PPF
3. LED #2AA (1,216 total chip count) = 500W*1.619 = 809.5 PPF
Notice the LED for the first row is different than rows 2 and 3. Rows 2 and 3 use the same exact LED.
What is that number in bold (1.619)? I checked his math and obviously that number in bold somehow decreases the PPF??
Here's the specs of LED #2AA. And the specs of the driver is below.
- Forward current = 65ma (max 150ma)
- Forward voltage = 3.0v
- Luminous intensity = 21.9(lm) (or 6.9cd)
- CRI = 95
- Viewing angle = 120 deg
