For critical applications, a colour temperature meter should be used, or the manufacturer's graphs consulted.

Colour temperature meters can read the temperature of the existing lighting conditions and guide the selection of the filter.

For critical applications, a colour temperature meter should be used, or the manufacturer's graphs consulted.

Photographers sometimes use color temperature meters.

A color temperature meter measures the color temperature of an incident illuminant.

Colour temperature meters can read the temperature of the existing lighting conditions and guide the selection of the filter.

There are filters, electronic flashes and light and color temperature meters to measure, change and create light.

Color temperature meters are usually designed to read only two regions along the visible spectrum (red and blue); more expensive ones read three regions (red, green, and blue).