HQI bulb burnt out?

[impreza]

Hi,

How do you know if your HQI bulb burnt out?

This morning, my light didn't come on. I checked the timer, it's fine. How do I know if the bulb is burnt out or there is something wrong with the ballast? The bulb is only about 8months old (EVC Tech bulb).

Also, how long can I go without a light? If I order a bulb today, it won't be here for at least a couple days... I have mainly zoo's and other softies.

Thanks,
Jonathan