Lumene Coliseum Silent Extra Bright LT 240C

Lumene Coliseum Silent Extra Bright LT: motorized ALR screens for long-throw projectors

In a living room, a lamp left on or light-colored walls are enough to reflect light onto the screen and wash out the projected image. The Coliseum Silent Extra Bright LT range addresses this with a gray screen surface that rejects stray light, held taut in a motorized housing that mounts on a wall or ceiling. Its six 16:9 screen sizes range from 92 to 180 inches diagonally, for a projector positioned some distance from the screen.

A gray screen surface that filters out unwanted light

A conventional white screen reflects everything that reaches it—the projector beam as well as the room’s lighting—so the image’s blacks can never be darker than the ambient light allows. The Extra Bright LT’s ALR surface (Ambient Light Rejecting) has a matte gray finish that directs light arriving from the front toward viewers and rejects light coming from other directions: more than 85% of stray light is rejected. Blacks retain their depth and colors their richness when the room remains partly lit, with 99% color accuracy.

Gray usually comes at the cost of brightness. With a gain of 1.2, however, this screen reflects slightly more light than a reference matte-white surface (gain 1.0), so the image retains its brightness with the same projector. The 140° viewing angle gives viewers seated to the side plenty of leeway: someone sitting at the end of a sofa remains within the screen’s viewing cone. The surface is 4K-compatible and treated to resist yellowing, dust and curling. Black borders frame the image and conceal slight spillover from the projector beam, while the opaque white backing prevents light from a window or lamp behind the screen from passing through the material.

A projector positioned at a distance, never close to the wall

LT stands for Long Throw. An ALR screen is optimized for light arriving at a specific angle, and this one is designed for the beam of a projector facing it from several meters away, mounted on the ceiling or placed on furniture at the back of the room. Short-throw and ultra-short-throw models, which project upward from below at a steep angle, are not compatible: the screen’s light rejection would work against their own beam. Before choosing a screen size, check the projector’s throw ratio (listed in its specifications) to determine the required distance.

Six screen sizes, two housing sizes

The first four sizes share a type B housing with a 14 × 14 cm cross-section, narrow black borders of 2.7 cm at the sides and 3.5 cm at the bottom. The 350C and 400C use a larger type A housing measuring 19 × 19 cm, with 8 cm side borders and a 5 cm bottom border; they weigh three times as much and exceed 50 kg. All versions have a 40 cm upper black border (extra drop), which brings the image down to eye level when the housing is mounted high. The housing is 20 cm wider than the image on type B models and 36 cm wider on type A models—worth bearing in mind for a narrow wall or alcove.

Side tensioning and a quiet motor

A basic retractable screen tends to develop waves along its sides, and an ALR surface does not handle these ripples well: they redirect light and create darker areas. Here, a side-tensioning system keeps the screen flat across its full height when deployed.

The screen is lowered by the 20 W DC motor used in the Silent generation. It operates below 50 dB and is rated for more than 20,000 cycles—over fifty years at one viewing session per day. Its S-curve motion control starts and slows the screen gently instead of moving it at full speed from the outset, making operation smoother and reducing strain on the material. The upper and lower stop positions can be adjusted electronically and precisely, so the image can be positioned to suit the room rather than a factory setting.

Controls and home automation integration

The included remote control works via infrared and 433 MHz radio frequency; the radio signal requires no direct line of sight, which is useful when the housing is concealed by a false ceiling or cornice. The remote offers fine position adjustment, and a manual switch (up, stop, down) is also available on the screen. For automated installations, the screen supports RS232 and RS485 home automation systems, dry contacts and a 12 V trigger: connected to a projector’s trigger output, it lowers the screen when the projector turns on and raises it when the projector turns off.

A sealed housing, wall-mounted, ceiling-mounted or suspended

The white-painted aluminum housing is sealed and has a dedicated ground connection that dissipates static electricity generated by friction as the screen moves. This helps prevent dust from being attracted to the surface and protects the electronics. Installation uses new L-shaped brackets, slimmer and sturdier than those of previous generations, and a clip system for attaching the housing. Supplied hooks also allow it to be suspended from a high ceiling. For the 350C and 400C, the mounting surface must support a load close to 60 kg.

Technical specifications

Image and screen material

• Aspect ratio: 16:9
• Diagonal: approximately 269 cm
• Viewable image size: 234 × 132 cm
• Black borders: 27 mm on the sides, 35 mm at the bottom
• Additional top black drop: 400 mm
• Screen material: tensioned 4K ALR for long-throw projectors, matte gray, 1.2 gain, 140° viewing angle
• Ambient light rejection: over 85%
• Color reproduction: 99%
• Compatible projectors: long-throw models only
• Screen material treatments: anti-yellowing, dust-resistant, anti-wrinkle
• Screen material backing: opaque white

Housing and installation

• Overall housing dimensions: 254 × 14 × 14 cm (housing B)
• Housing: white-painted aluminum, sealed enclosure with antistatic grounding
• Installation: wall-mounted, ceiling-mounted or suspended, L-brackets

Motor and controls

• Motor: DC, 20 W
  • Noise level: below 50 dB
  • Service life: over 20000 cycles
  • Movement: S-curve
• End-stop adjustment: electronic limit control
• Control interfaces: RS232, RS485, dry contacts, 12 V trigger
• Manual controls: up, stop, down

Included accessories

• Infrared / 433 MHz radio-frequency remote control with fine adjustment
• Hooks for suspended installation

Packaging and weight

• Package dimensions: 281 × 22 × 21 cm
• Weight: net 18.9 kg, gross 23.4 kg