
If you started out with a light and a switch, and you wanted a fan/light, combo, this is the thing to use at the switch end. You can dim the light and set the fan to a certain time to go off after you leave, or set it to stay on indefinitely, say if there was a spill, for example.

ENERLITES Countdown Timer Switch For Bathroom Fans And Household Lights, 1-5-10-15-20-30 Min Settings With Manual Override, Always On Blue LED, Neutral Wire Required, UL Listed, HET06A, White, 2 Pack
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Wireless Electronic Ballast Interface Certified
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π Robertson 2P20132 Quik-Pak: 10 Fluorescent eBallasts for 2 F40T12 Linear Lamps, Preheat Rapid Start, 120Vac, 50-60Hz, Normal Ballast Factor, NPF, Model RSW234T12120 /A (Crosses to RSW240T12120 /B)
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π‘ Hydrofarm Quantum QT400 Dimmable Ballast for 400W Grow Lights
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