those are very blue lights good for vegging while they veg slowly pic up some of the 3000k 26 watt cfl's if your in the states 3 pack 7.88 these are better for budding. best of luck. Harvesting and smoking some of my first buds grown under cfl's you need alot of them but they work well. obviously for those a bit more gifted financially HID is the only way to go...but for decent results on a budget cfl's work they blow 4" flouro tubes out of the water.