ETC Desire Series v1.6.0 User Manual - Manual (Page 25)

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Installation and User Interface Overview 19
Note About LED Fixtures
All LED sources experience some lessening of light output and some color shift over time.
Desire Series fixtures have complex thermal management systems to minimize these
changes. With typical usage, a Desire fixture will still achieve at least 70% of its initial output
after 50,000 hours of use (B50, L70). In individual situations, LEDs will be used for different
durations and different levels. This can eventually lead to minor alterations in color
performance, necessitating slight adjustment to presets, cues, or programs.
All LEDs may exhibit a slight shift in output as they rise to full operating temperature. Desire
Series fixtures allow the selection of different power settings in order to balance the
competing requirements of thermal stability and brightness. Depending on the selected
setting, changes in output as fixtures warm up may or may not be visible to the eye.
Color Rendering Index and Color Quality Scale Ratings
Desire fixtures are evaluated for Color Rendering Index (CRI) and Color Quality Scale
(CQS) performance using measured output spectrum and optimized mix solutions for a
best spectral match to black body sources at 3200K and 5600K. Color fidelity was also
measured. These numbers may fluctuate slightly from fixture to fixture. This is a normal
characteristic of white LEDs, and this kind of variation is highly unlikely to be apparent in
most applications. The performance is the same for all fixture versions.
Desire luminaires provide excellent color rendering, particularly the color-mixing versions.
A Duv rating of 0.000 indicates that the color mix used was exactly on the black body line,
with no green or magenta tint.
Studio Daylight and Studio Tungsten fixtures use only white-type LEDs at a fixed color
temperature in order to maximize output and efficacy.
Fixture CRI CQS Color Fidelity TLCI Duv
Vivid at 3200K 87 89 89 65 0.000
Vivid at 5600K 90 92 92 74 0.000
Lustr+ at 3200K 86 88 88 66 0.000
Lustr+ at 5600K 93 92 90 86 0.000
Studio HD at 3200K 89 90 91 85 0.000
Studio HD at 5600K 92 94 94 91 0.000
Studio Tungsten at 3000K 86 86 86 56 0.001
Studio Daylight at 5600K 71 70 69 43 0.001