Flush Mount Ceiling Light Installation

Installing flush mount lights I bought from amazon. Most flush mount lights should be similar.
www.amazon.com...

[@user-ev4gj1nw4h]

Thank you for your vidio,
Where can I buy the lightbulbs ? I'm curious size(inch), price

[@thehondafitguy]

www.amazon.com/Ceiling-Fixture-Surface-Laundry-Dimmable/dp/B0B2P1KPCP?ref_=ast_sto_dp&th=1