This Spectrum Series LED Solitaire features a warm white beam. Warm white light is the ideal light source for working in tight spaces. – Preferred light for electronic technicians because warm white LEDs allow the full-color spectrum to be seen in detail on wires/cables. Cool white Light LEDs make browns, blacks, and reds look the same; warm White LEDs do not mask color. – For situations in which a flashlight will be used for an extended period, warm white LEDs avoid eye strain because it is a natural light similar to the sun’s rays, unlike regular white LEDs.