HQI ballasts overdrive the mh bulbs. i.e. 350 watts on a 250 watt bulb. That's why if you have hqi ballasts you "should" use hqi bulbs or the life of the bulb can be shortened.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.