62 CHAPTER 3 Light fixtures: The basic tungsten arsenal POWER/DMX Some ERS accessories are fed 24VDC power and DMX512 control signal using a single 4-pin XLR cable. This arrangement is not in accordance with the DMX512 standard, but it provides convenience by feeding multiple accessories from a single Power/DMX power supply. Typically, pins 1 and 4 provide 24VDC, and pins 2 and 3 provide DMX512 (although some devices are set up differently, so the compatibility must be checked). The control signal is fed to the power supply using the standard DMX512 5-pin XLR connector. The power supply proves IN and THRU connections for this signal. The power supply then provides 4-pin XLR outputs to feed signal and power to the accessories connected to it. The 4-pin XLR may be daisy-chained to multiple devices. The total wattage of these devices cannot exceed the wattage of the power supply. Power supplies are available for a single accessory or multiple accessories. Typical power supply wattages are 60, 150, 300, and 600 W. The following list gives you an idea of how much power is consumed by various accessories: Apollo Smart Color Scroller: 38 W Apollo MXR Color Mixing Scroller: 43 W Apollo Smart Move DMX: 13.5 W Apollo Smart Move Vertical: 13.5 W Apollo Roto-Q DMX: 12 W AC Lighting Chroma Q Broadway: 22 W AC Lighting Chroma Q M1, 2, 5, 8: 36 W City Theatrical DMX Iris: 8.5 W DHA Twin DMX: 12 W Gam DMX Twin Spin: 14.4 W Gam SX-4, 6 Gobo Tray: 10.8 W Rainbow 6 00 , 8 00 , 12 00 Pro Color Scroller: 14 W Rainbow 15 00 Pro Color Scroller: 29 W Rosco I-Cue Mirror: 17 W Rosco DMX Rotator: 6 W Wybron Forerunner: 14 W (For more about DMX512 and optical isolators, see Chapter 11.) DEDOLIGHTS Dedolights (manufactured by Dedotec) are small, compact fixtures that use two specially designed lenses in an assembly that is more efficient than a Fresnel and that provides a hard, adjustable beam with exceptionally even light across the field (Figure 3.28). In set lighting, the DLH2 kit has become an important part of the equipment package. This kit includes three 100 or 150 W fixtures, a power supply, cables, and accessories. The special lens assembly gives the fixtures punch for the long throw and an unusually wide range of adjustment (the DLH2 model ranges from 40 in full flood to 2½ in full spot). A 100-W Dedolight has roughly the same light output as a 300-W Fresnel. The lights are so small, lightweight, and unobtrusive that they can easily be hidden in the set. The lights have various accessories, including barn doors, gel frames, lightweight mounting hard- ware, suction mounts, camera clamps, and a focal-spot-like projection attachment. The projection attachment allows extremely precise control of the beam. It can be shuttered in on a beer label, for instance, providing a hard edge cut with no color fringing or softness around the edges. For this reason, the lights are useful in tabletop setups and miniature work.