does everyone here change the bulbs when the blinking light tell you, this is my 3rd grow none have gone good, I am really checking the ph this time and not over doing it with nutes, I have replacement bulbs but its growing fine right now should I replace the bulbs for new one or wait till the old ones die completely, I was checking amazon for light meters that say they can tell how much light gets to ur plant, thinking of getting one to check my current lights before replaceing them, also wanted to add more cfls along with a red led grow light when I switch to 12/12
Cmikeb: Here's a couple of things you might want to consider. My electrician friend once told me that bad, (worn out), lamps can overload the ballast/starter. The ballast is in the hood and if it goes they recommend that you replace the entire hood assembly. My guess is that like everything else in the Aerogarden it's proprietary and you probably couldn't get it with out a trip to China. As Aerogareners that's our cross to bear.
I seriously doubt they'll die immediately after six months of use because I know of a couple of times that I accidentally exceeded that limit. I don't have the lamp warning light on my older models and I've had no problems.
The light meter sounds like a good idea, although it won't measure the available wave lengths.
According to Aerogarden's customer service, "We change the lights to maintain the same wave lengths and luminosity." So there's something to think about too.
One other thing my electrician friend told me was to pull any flourescent lamp that turns gray at the ends. He said that was a sure fire warning that it's going to fail.
As far as additional lighting, I think that's a waste of time and money. I tried it but it wasn't that effective. Reflector panels will make a hell of a difference. Check some of my posts on that subject. You can get buds all the way down to the planting deck with reflective Mylar panels..
It's imperative that you check you pH daily when you're growing in that little reservoir and change it weekly. That what I was taught and I think I have a better track record than most. I hope this helps.