so In my shop I had 4" T8 lights (12 of them). but not very bright so over time in the 2 years I changed to 8ft T12HO.
now I noticed after 1.5 years the ballast are slowly failing. so wondering if I should stick with t12 or nows the time to slowly change to t8.
the t12 are $79 Cnd each vs the...