In this guide
In short: look for high color rendering, adjustable color temperature and brightness, light that covers the whole work area, controls you can reach without stopping, and a size that fits your desk. If you film your work or move between locations, add a phone holder and a frame that folds.
1. Color rendering (CRI)
The Color Rendering Index (CRI, or Ra) measures average color fidelity. It compares how a light renders eight standard test colors with how a reference source of the same color temperature renders them, on a scale that typically runs up to 100, where 100 means a match with the reference (U.S. Department of Energy, LED Color Characteristics).
For nail work, where you match and blend shades, a higher CRI is a useful sign that colors will look closer to how they do under that reference light. It is an average, though: the same fact sheet notes that two lights with the same CRI can render colors differently, and that CRI does not describe saturated reds well. Check the number the manufacturer states, and look at your own polishes under the light when you can.
2. Color temperature
Color temperature is measured in kelvin (K). Lower values look warmer and more yellow; higher values look cooler and more blue. A light with more than one setting lets you check a shade under warmer and cooler light and choose what is comfortable for the room.
3. Brightness you can adjust
Being able to dim matters as much as maximum brightness. Adjustable levels let you match the light to the room, the task and the time of day.
4. Shape and coverage
A single-head lamp lights the work from one direction. An arch or half-moon light spans the work area and lights it from more than one direction. Think about where your hands, your client's hands and your tools sit, and choose a shape that lights all of them.
5. Space on and under the desk
Check the stated width and height against your desk, and make sure there is room underneath for hands, an arm rest and tools. Measure before you buy.
6. Controls within reach
Controls on the light itself, or a remote, mean you can adjust the light without searching for a switch on the cord.
7. Filming and following tutorials
If you record your sets or follow tutorials, look for a phone holder you can tilt and rotate to frame the work, and somewhere to rest a phone for viewing.
8. Storage and travel
If you don't have a permanent station, or you work house calls, a light that folds and has removable bases is easier to store and carry.
9. What comes in the box
Check whether the power adapter, phone holder and accessories such as an arm rest are included, or need to be bought separately.
Quick checklist
- CRI stated, and high
- More than one color temperature
- Adjustable brightness
- Light across the whole work area
- Fits your desk, with room underneath
- Controls on the light or a remote
- Phone holder, if you film
- Folds, if you store or travel
- Box contents you need
How the Half-Moon Light answers the list
The Cosmivera Half-Moon Light has CRI ≥ 90, three color temperatures between 3000K and 6500K and ten brightness levels. Controls are on the light, and a remote is included. It has an adjustable phone holder and base holders for a phone, folds in half with detachable bases, and comes with a nail arm rest and power adapter. It is a work light: it does not cure gel polish. See the full specifications.