| For growers under lights
When is a good time to change the tubes in a flourecent set-up. I know that the tubes lose there effectiveness after a while but, how long is too long. My lights tubes have been in for about six months and I was thinking of starting to change them out. Foot candle reading is about 750 at about two inches away. The plants look healthy, mostly phals but a few catts till they can go back outside. One phal has started to spike again which makes me think the tubes are still good and I might just be wasting money. Any input would be good. |