Gee...did you read the article...? Perhaps you should carefully look over the UV light threads here on CanCom. Pretty informative.

Doubtful I'll ever move away from my 1000w HPS. Produces a quality product. Also, I use supplimental UV light in flower. (for those that wish to try and use UV light, use proper care. UV can cause skin cancer and really does put you at risk for eye damage)