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I don't know if you're talking about a shower, there are two light sources in the shower, one is heating, and energy-saving lamps can't be used, and the other is lighting, which can be used with energy-saving lamps.
From the perspective of efficacy, it is not necessary, but it seems to be more accustomed to having a ceiling light visually.
Absolutely. However, if the ceiling is suspended, it is better to use flat LED lights.
It is best to install lighting, bath bomb lighting has limitations, especially the washbasin is easy to backlight and inconvenient to use.
I insert it with a flathead screwdriver from the side plating lampshade and pry it down, and there is a pressure spring.
The bathroom has heating lights, lights, and exhausts, but the lighting lights can be replaced by themselves, and other electrical appliances need to be replaced by professionals.