Lumene Coliseum Silent Extra Bright LT 270C

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 installed some distance from the screen.

A gray screen surface that filters out unwanted light

A conventional white screen reflects everything it receives—the projector beam as well as the room’s lighting—so the blacks in the image can never be darker than the ambient light allows. The Extra Bright LT’s ALR surface (Ambient Light Rejecting) is matte gray. It directs light arriving from the front toward viewers while rejecting light 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 stays bright with the same projector. The 140° viewing angle leaves plenty of leeway for seats to the side: someone sitting at the end of the sofa remains within the screen’s viewing cone. The surface is 4K-compatible and treated to resist yellowing, dust, and warping. Black borders frame the image and conceal minor overspill from the beam, while the opaque white backing prevents light from a window or lamp behind the screen from shining through.

A projector positioned at a distance, never right up against the wall

The letters LT stand for Long Throw. An ALR screen is optimized for light arriving at a specific angle, and this one is designed for the beam from 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 light rejection would work against their own beam. Before choosing a screen size, the projector’s throw ratio (listed in its specifications) tells you the distance required.

Six screen sizes, two housing sizes

The first four sizes share a type B housing with a 14 × 14 cm cross-section and slim black borders measuring 2.7 cm on 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 borders on the sides and a 5 cm border at the bottom; their weight is three times as great and exceeds 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 up. The housing is 20 cm (type B) to 36 cm (type A) wider than the image, something to bear in mind for a narrow wall or alcove.

Side tensioning and a quiet motor

A basic retractable screen tends to ripple at the sides, and an ALR surface does not cope well with these waves, which deflect 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 runs at under 50 dB and is rated for more than 20,000 cycles—over fifty years at one viewing session a day. Its S-curve control starts and slows the screen gently instead of moving it at full speed straight away, making operation smoother and reducing wear on the screen. The upper and lower stop positions can be adjusted electronically and precisely, so the image position can be tailored to the room rather than a factory setting.

Controls and smart home integration

The supplied remote control uses infrared and 433 MHz radio frequency; the radio signal works without a direct line of sight, which is handy when the housing is concealed by a false ceiling or cornice. It includes 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 for smart home systems, dry contacts, and a 12 V trigger: connected to a projector’s trigger output, the projector lowers the screen when switched on and raises it when switched 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 the screen surface rubbing as it 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 of nearly 60 kg.

Technical specifications

Image format and dimensions

• Aspect ratio: 16:9
• Diagonal: 304.8 cm (approximately 305 cm)
• Viewable image dimensions: 266 × 149 cm
• Black borders: 27 mm on the sides, 35 mm at the bottom
• Extra-drop top black border: 400 mm

Screen material and optical performance

• Tensioned 4K ALR screen material for long-throw projectors only
  • Finish: matte gray, 1.2 gain, 140° viewing angle
  • Ambient light rejection: over 85%
  • Color reproduction: 99%
  • Treatments: anti-yellowing, dust-resistant, anti-curling
  • Back of screen material: opaque white

Housing and installation

• Type B housing: 286 × 14 × 14 cm overall, white-painted aluminum, sealed housing with antistatic grounding
• Installation: wall-mounted, ceiling-mounted or suspended, with hooks and L-shaped brackets supplied

Motor and controls

• DC motor: 20 W, noise level below 50 dB, service life of over 20000 cycles, S-curve movement
• Limit adjustment: electronic limit control
• Control: 433 MHz infrared / radio-frequency remote control with fine adjustment, RS-232, RS-485, dry contacts, 12 V trigger, manual up, stop and down controls

Packaging and weight

• Package dimensions: 301 × 22 × 21 cm
• Net / gross weight: 20.4 kg / 25.3 kg