I ordered a few of them for my electronic projects. The plastic is thick enough to provide enough support for outlets, buttons, knobs, fans, or a small display.I didn't try the water proof feature so I can't comment on that. That said, it looks like it might work if heat dispensing is not a problem in your climate.
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ATPWONZ Junction Waterproof Electrical 5Mm 10Mm
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π‘ GE Lighting 72266 Fluorescent T8 Ballast 2 or 1 F32T8 Lamps - UltraMax Electronic, Instant Start, Multi-Volt (120/277V)
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