lights?

[rmarc005]

How do you know when the lights in your tank need changing?

[boxfishpooalot]

The easy way is just replace florecent every 6 months, and halides every year.

Otherwise you can buy a 100-200$ lux meter. Which measures lux(light output). Or a spectrometer to measure spectrum, but thats very confusing.

[jerehmy]

whats up with that avatar? You into the hulk?

[arowanadream]

I change them every year