Ballast ?

[cincy boy]

Iv had my 250 watt HPS for 2 years almost and I no that the ballast have to wear out some time I was wondering how often should I get a new one?

[notthecops]

When it stops working. When they go, they don't work anymore. But I've been using the same ones for 8 years, and never had to replace the balast, just the ignitors.