Keep in mind 2 240w blackstars still pull < 300w of electric - in super soil I get better results than a 400w (non super soil) with one 240w blackstar.
How do you define 'better' LED on the market... i know there are a lot of people who didn't have good results with blackstars, but so far I have and haven't had one issue with'em. Mine are relatively newer so I think maybe there were more issues with older models. I love my 2012 models. I'm not saying they're the best LED either... for my money they are the best on price per watt
And if blackstars are one of the worse models compared to the 'good' ones, and I get really good results with blackstars, then doesn't that mean the fancy ass models that are 3x as expensive you be putting out way better? I dunno I don't see how a watt of their light is going to outperform a watt of light from a blackstar... proof is in the pudding as always it's results. I don't really expect anyone to take my word for it, and I don't really want to make much in the way of bold claims, but if I produce similar results to my last led supersoil grow this time you are going to hear some bold claims.
Only regret this time is it isn't pure super soil (long story) i'm getting ready to mix up two different batches (original vs guano based) for next round though. So far I'm liking what I'm seeing through the first few days of flower but just gonna have to wait a couple of months to see how they turn up.
LEDs put out a lot less heat than HPS - you can get HPS cooler with proper venting -- but not without it. Some of us don't have the option of proper venting.
Oh and yeah they are expensive -- Around $1500 for my 6 240s. Wish I had more. Same wattage from most other higher end suppliers would be at least $3k and sometimes a lot more.