Dimmer works to set the light and dim the light. If without dimmer then the light is patent alias cannot be arranged. So you can just turn it off and on without setting its intensity if buying a dimmer. In the meantime, you may visit https://www.luvostore.com.au to find the excellent right lights and makeup mirrors online.
Surely this depends on the needs that are tailored to the skin color of the face. If high complexity, such as uneven color, will be easier to wear that has dimmers.
As for the size of the diameter of a large or small lamp also affects the results. Small size ring lights usually have fewer lights. Of course still functioning illuminate the face well but not as bright as the number of lights a lot. Depending also on the far near you place the ring light in front of the face. The closer the light shines.
In addition, the halo effect alias the reflection of the circle in the eyeball is also different. Small size Ring Light will produce small spherical reflections, but a large one can almost meet the eyeball.