For 4ft fluorescent kits you can mix t8 and t12 bulbs that are 4ft or shorter in a 4ft box. For 8ft fluorescent kits you can mix t8 and t12 bulbs that are 8ft or shorter in a 8ft box. Please do not mix non-fluorescent bulbs in the fluorescent kits. We have other kit options available for non fluorescent bulbs.
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Materials