I grow with LED's and consider them more than up to the task of growing herbs.
The main issue with adding 6000watts of LED lighting is the buy in price. Dependant on manufacturer your taking thousands and thousands (and probably thousands) of bucks. You'll definately save on cooling cost though.
Another problem is if your spending that kinda money, you'll want to know it works, large scale. Not many large scale growers have transitioned over to LED's due to expense and doubts in the canna community on the ability of LED's to perform in bloom. This means it'll be hard to find examples of LED's working large scale, so you'll almost be 'taking a risk' on the return of the purchase costs of the lights. Maybe start by adding one or two lights and make a judgement from there if your happy with the performance prior to committing wholesale.
