Replacing HPS Bulb?

[Pay It Forward]

I have a 600 watt digital ballast. How many grows before I replace it.

Is Hortalux that much better than Plantax?

Do I need a digital bulb with a digital ballast?

Thanks to all & Peace

PIF

Pay It Forward Reviewed by Pay It Forward on 09-20-2011. Replacing HPS Bulb? I have a 600 watt digital ballast. How many grows before I replace it. Is Hortalux that much better than Plantax? Do I need a digital bulb with a digital ballast? Thanks to all & Peace PIF Rating: 5