There are a variety or ring lights that come in different sizes and styles and they vary in price.
They can have the effect of simulating different color temperatures. The large 18″ diameter ring can illuminate your entire face in what’s know as a butterfly light effect, when looking head-on it makes for an excellent beauty shot. Most of them have a color temperature between 2000k to 5000k using fluorescent or LED bulbs which is closer to natural light. Check out my other post here if you want to learn more about color temperatures. These tend to be around $85 to $100+ (See the photo above)
The smaller you go in diameter the less expensive the lights. The medium size ring lights are typically around 8 to 10 inches and are priced around $30 to $40. With these you can still add filters to simulate different color temperatures.
Smaller ring lights are around 3-5 inches in diameter and are priced between $10 and $25. They are not as bright as the other lights but can add supplemental lighting when needed for videos, photos or blogs because they are portable.