Do I need to change the light bulb? How often?
I have bought air purifier with UV(I believe) light and fan from Gaiam which got the light bulb dead after about 2 years. I did not bother myself to look for the way to get new bulb as it was pretty big and seemed only mailing was available. And even Gaiam does not seem to carry that product anymore.
I am concerned how much and how often I have to spend for some parts replacement and the impact on earth.
(Obviously, throwing that bulb did not look good on earth.)