Alera Lighting

PPLS

PLANK PLUS LISO Overview

Rectilinear shape with clean, elegant lines. Mounts as close as 1' from ceiling plane to bottom of housing. Wide light distribution for 12' OC spacings. Combines with Plank.

PLANK PLUS LISO FEATURES

Close-to-ceiling mounting 12” to bottom of housing
Performance driven light delivery system creates smooth ceiling gradients with wide fixture spacings
T8 two-lamp cross sections allow use of industry standard, energy efficient, low cost lamps and ballasts with excellent performance
T5 or T5HO one-lamp cross section harnesses emergent technology for unparalleled performance metrics
White cross baffle with overlay standard, additional shieldings available
Optional perforated housing allows perforated, slotted, or patterned Optional perforated housing allows perforated, slotted, or patterned
Heavy 20-gauge construction provides excellent housing rigidity; patented die cast aluminum joiners ensure excellent row integrity
Low profile, attractive adjustable cable mount hanging system
Adjustable 12” cable length facilitates ease of installation when mounting 12” from ceiling plane to the bottom of the housing. Other lengths available
Consistent, predictable mounting locations simplify installation

PLANK PLUS LISO Technical

SPECIFICATION INFORMATION

Construction

Plank Plus Liso is direct/indirect fluorescent architectural lighting designed for mounting as close as 12" from the ceiling to the bottom of the housing. Plank Plus Liso is constructed of a heavy 20-gauge steel body with a 9 7/8" wide by 2" high profile in 4', 8', or 12' lengths. Fixtures are available with one T5, one T5HO, or two T8 lamps in cross section. Mounting points maintain convenient, predictable locations. The exact shape of the housing is maintained by the use of a patented inner die cast plate at each fixture end (patent 6,796,676 B2) throughout the run to prevent snaking. The housing is designed to wrap around the plate and secures on top with concealed screws to ensure housing tolerances are consistent.

Finish

Housing and all painted parts are treated with a multi-stage phosphate prior to finish. Parts are then finished with a white powder coat for maximum consistent coverage and longevity. Other colors may be specified.

Shielding

Plank Plus Liso includes both direct and indirect lighting elements. Shielding for the direct element may be selected as a white cross baffle with opal overlay (WCB), regressed perforated panel (RPF), or flat perforated panel (FPF). Housings may be ordered as solid (S), perforated strip (PFST), or diamond patterned perforated strip (DPST) along both sides of the shielding opening to provide visual interest.

Mounting

Plank Plus Liso is designed to provide smooth ceiling gradients when mounted 12" from the ceiling plane to the bottom of the housing. An adjustable 12" aircraft cable yoke mount is standard. The PPLS profile is only 2" high; this allows a 10" suspension length plus 2" for adjustability as desired. Longer lengths are also available as the product typically provides excellent performance at mounting heights below 12" as well. The cable yoke attaches from two points at each hanging location. The end of the cable barrel screws into a standard 1/4 20 bolt brought down from the ceiling. Cover plates can be used to shield ceiling cutout. Straight (standard) or optional coiled cord is used at feed locations. All fixtures must be supported at each fixture housing end.

Labels and Electrical

All fixtures bear appropriate UL labels. Fixtures are prewired with small case or micro-can electronic T8, T5, or T5HO ballasts in 120 or 277 volt. Some dual voltage 120/277 options exist. All fixtures are wired standard for single circuit operation. Additional circuits can be supplied as an option; see ordering guide below.
CROSS SECTIONS

PPLS-1T5 or PPLS-1T5HO

PPLS-2T8
BOTTOM VIEW

Perforated Strip Housing

Solid Housing
INSTALLATION

Fixture Connections

Suspension Attachment