T8 and T12 fluorescent tubes are used in different commercial spaces, but they are not energy-efficient. They have a tendency to hum and flicker, contain mercury, have a short lamp life and a poor color quality, and their light cannot be fully dimmed. This article was first posted on https://www.myledlightingguide.com/blog-choosing-the-best-led-replacement-tubes
source http://my-led-lighting-guide.tumblr.com/post/178698348818
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