Surely someone that reads as much in the internet about lighting would of worked that out by now ? HPS have been around for 30+ years because it fucking works . Period ! No one has says they are great , we just pointed out you can grow great frosty buds and great results under hps . The technology here is new therefor fucking expensive not many people can afford 1300$ on a light when they know a $ 300 digi ballast will do a great job . I am grateful FIWH has posted his experience and honest evaluation You can blame your light , but your weak results could be due to a number of things genetics , environment , etc.. Spend $1300 on alight to realize your piss poor results are from other factors .