Note About Led Fixtures; Scale Ratings - ETC Desire Series User Manual

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 is 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.
Fixture
Vivid at 3200K
Vivid at 5600K
Lustr+ at 3200K
Lustr+ at 5600K
Studio HD at 3200K
Studio HD at 5600K
Studio Tungsten at 3000K
Studio Daylight at 5600K
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.
16
CRI CQS
87 89
90 92
86 88
93 92
89 90
92 94
86 86
71 70
Color Fidelity TLCI
89 65
92 74
88 66
90 86
91 85
94 91
86 56
69 43
Desire Series v1.8.0 User Manual
Duv
0.000
0.000
0.000
0.000
0.000
0.000
0.001
0.001