https://www.icmag.com/ic/showthread.php?t=127881
bozo that link you posted has a chart the shows the Lumens produced by “ High Pressure Sodium “ bulbs , it shows that you should keep the 1000 watt bulb 10 inches above the plants and the plants will get 64,171 Lumens .
It also shows that if you put the bulb 4 inches above the plants it puts out 401,070 lumens , I understand that you cant put it at 4 inches with out cooking the plants but what I don’t understand is how can a bulb that is rated 140,000 Lumens put out 401,171 Lumens .
Watching what happened when you guys tried to help that poster reminded me of a story --- A father and son were walking down the street and they seen two dogs humping like crazy , the kid asked his dad what they were doing , the dad told him the dog on top must have broke his leg and the dog on the bottom was trying to help him get home , the kid said I see what that saying means now , the father then asked his son what saying is that , the kid says , well they say if you try to help someone in need you will get fucked every time .