I am hoping someone who understands lighting better than I do can help me with what should be some rather simple calculations. I could use a light meter except for the fact I don't have the actual LEDs in my possession to test them. I am trying to decide which lamps to buy based on these calculations. I have already taken into account photosynthetically active radiation. All I am looking for here are the illuminance numbers. All numbers I give are assuming that the lamps' given specifications are fairly accurate.
I am trying to figure out how many LUX or footcandles -- either number will work for me since I understand how to convert one to the other -- will be reaching my plants' leaves. Just be sure to specify what specification you are giving -- LUX or footcandles.
First scenario: 1240 lumens (luminous flux) with a 40° spread with the distance between the light source and the top surface of the plant leaves at 28 inches (.7112 metres) centered directly under the lamp.
Second scenario: 920 lumens (luminous flux) with a 40° spread with the distance between the light source and the top surface of the plant leaves at 28 inches (.7112 metres) centered directly under the lamp.
I hope there's someone here who can figure this out. I should be able to do it, but I'm having a brain fart today. I'll keep working on it in the meantime. It shouldn't be that difficult.
I am trying to figure out how many LUX or footcandles -- either number will work for me since I understand how to convert one to the other -- will be reaching my plants' leaves. Just be sure to specify what specification you are giving -- LUX or footcandles.
First scenario: 1240 lumens (luminous flux) with a 40° spread with the distance between the light source and the top surface of the plant leaves at 28 inches (.7112 metres) centered directly under the lamp.
Second scenario: 920 lumens (luminous flux) with a 40° spread with the distance between the light source and the top surface of the plant leaves at 28 inches (.7112 metres) centered directly under the lamp.
I hope there's someone here who can figure this out. I should be able to do it, but I'm having a brain fart today. I'll keep working on it in the meantime. It shouldn't be that difficult.