Thefacts of light
Fact 05
The effects of brightness degradation
Fact 05

Brightness degradation

As brightness drops off, the color gamut shifts, requiring correction and recalibration to maintain the DCI-P3 color. The trade-off to make these color corrections is a less efficient projector, further driving down brightness and accelerating the issue. The result is a dark, dim and inaccurate visual presentation that is only correctable by changing the expired Xenon bulb or laser module with a new one.

DCI P3 color: the cinematic standard

Watch this video and find out how Xenon and laser phosphor stack -up when it comes to meeting the DCI standard for color.

Spectrum comparison: Xenon light and day light

What makes Xenon so well-suited for cinema? The native light spectrum of a Xenon lamp closely replicates the day light spectrum. Because of this, it can accurately reproduce the natural colors audiences are used to seeing for a realistic and true-to-life experience.


Christie® Xenolite short arc Xenon lamps
Engineered for superior performance in all cinema applications

Spectral response curves

This series of graphs shows each illumination platform’s efficiency in producing the DCI specified white balance. The easier a projector can achieve DCI white without filtering, the more optically efficient the system is.

Laser phosphor
RGB pure laser
Xenon produces a balanced spectrum of color requiring minimal filtering to achieve DCI white.