sailfast
Silver Member
come on, that chart is showing 90-95% retention for florescent thru its life (20-30,000 hours). Metal Halide can drop 50% during their 5,000-9,000 hr rated life. Dont get me wrong, i love MH lighting, but im starting to love the high output T5's more.
I just put one in my shop over my work table.
Yea! That is one of the best features of MH lights! :thumbsup:
Most of the drop off in output happens when they are nearly ready for replacement. Brand new ones are brighter than rated, they get dimmer a bit straight away, are steady for most of their life, and get dim before they need replaced.
In order to plan bulb replacement I just make note of dim bulbs. :thumbsup: