are you refering to lightstrength being less strength with distance x sqr root? I think I can understand a part of it. Or maybe you could help explain...?
why are you constantly harping around this subject, what's so important? what all different colors do you wanna hit, and @ what time each day @ what strength?
CMH puts out more light than comparable HPS so at some wattage it makes economically sense to just use it. They also emit less heat... which could be either a positive or a negative factor depending on the circumstanmces.. so I'm not saying your totally right, just that most people at a certain point felt that this is a good solution, and it is! But most nowadays say LED is The KING, but here comes the price. And the most expensive is always the best... if you're dealing with a respectable saler, a professional. You get what you pay, if the industry spends money ont hings that are just poor, they business will not flower. You really think people spend about 5 times in cash to get something that isn't better? Or even worse? Like they don't have a brain. I did run both thi summer, and the instruments in these tents were significantly favourable towards LED.
and LED can emit alot of different colors of light, so I'm not seeign where the problem is.... you can just mix about many type on a board and manually or automatically toggle on/off. You can't have such a flexibility with HPS. It's always the same, you could buy different colors but then you've to run 4 times 150W instead 600W - but these lamps are not efficient.....
No why? In some situation HPS is clearly better. The price of HPS is much more cheaper, so if you grow just 1 time a year for yourself, as a homegrower, all you need is 300 bucks and 3 months time, and some electricity cost on top afterwards... or if you have a basegrow going where heat is needed...