400 watt hqi de bulb life?

[Hockeydad]

Running three. Two for 8 hours and third for 4 hours a day.
What is the expected life of bulbs?
Thanks

[BLANKENSHIP76]

I would say 10-12 months for 8hrs a day and 20 months for 4 hrs a day. I run mine 250W HQI for about 10 months 8hrs a day.

I think there is still a ton of life in them I just get nervous so I change them.

Jason

[RufRidn]

When i talked to PFO they said 6 months. Ive changed the bulbs 3 times and on average they last about 8 months. The last one burnt out at 12 months.