Advice on fluorescent lights for the ignorant...
I was given a plant light unit - it has 4 shelves, each with a fluorescent light fixture that holds a pair of 24" bulbs. The bulbs in it are Sylvania GroLux T12. I was planning to replace them as I don't know their age, and I had heard that even if fluorescent lights work, you should replace them every year or so. So first, someone tell me if that's correct. I do have to replace some of the (what's the word - ballast? starter? the things that are FS-2).
Now, I went to HD and checked out lights - the "Plant and Aquarium" light bulbs (20w) are 8.50 each. That adds up if you are replacing eight of them. Are there cheaper alternatives or sources? I'm just starting common stuff - marigolds, zinnias, basil, tomatos, etc.
Thanks for any advice!