Louvers, Eggcrate, Aluminum, Baffles, Flat Sheet and Retrofit Kits

Parabolic Louvers

Parasquare 1

P1® is the internationally recognized industry standard small cell injection molded plastic parabolic louver. The nominal 5/8” x 5/8” x 7/16” (16 x 16 x 10,2mm) cell size.

Parasquare 2

P2® is the industry standard 1-1/2” x 1-1/2” x 1” (38 x 38 x 25,4mm) injection molded plastic parabolic louver. This internationally accepted product satisfies the demands of both efficiency and luminance control.

Parasquare 3

Parasquare 3® with mid-sized 3/4” x 3/4” x 1/2” (19 x 19 x 12,2mm) cells provide 35 degree shielding and maintains energy saving efficiencies. P3® reflects SLP’s commitment to high efficiency louvers by offering not only an unsurpassed optically engineered wedge back design but also the molded louver configurations that will maximize energy budgeted applications.

Parasquare 4

The Parasquare 4® combines superior beauty, light control and the highest light transmission in a plastic louver. This larger cell 3″ x 3″ x 1-1/2″ (76 x 76 x 38mm) louveroffers the highest efficiency and coefficient of utilization of any member of the Parasquare® family.

Parasquare 5

P5® is the low brightness louver of choice when energy budgeting is critical and controlled luminance is required. The 3/4” x 3/4” x 3/8” (19 x 19 x 9mm) flat back louver design affords efficiencies equal to those of lenses while maintaining 99% of it‘s distribution in the 0-60 degree zone.

Eggcrate Louvers


Thincell 1/2” (13mm) cube plastic louvers are accepted as the worldwide standard. Thincell provides efficiency, economy and moderately controlled luminances. These panels feature shiplap perimeter detailing to facilitate an unbroken appearance when parts are butt joined in continuous row application.


SLP‘s Thincell™ TC is an injection molded cube louver that offers unequalled efficiency, economy and dimensional versatility. Standard finished include opaque white, black and specular silver. TC is molded in both 2’ x 4‘ and metric panel sizes. The nominal 3/8” (7,6mm) thickness offers an important freight advantage when cube and container capacity is an issue. All molded sizes include a half lap perimeter detail that facilitates continuous row applications with an unbroken appearance.


SLP‘s Thincell™ TC500 is an injection molded cube louver that has the traditional half inch cell size but with a reduced thickness to provide the economy everyone is looking for. Standard material is white styrene. TC500 is molded as a 2’x4‘ and is available in lesser nominal sizes.


T3060 Eggcrate is slightly larger cell size (11/16” x 11/16” x 9/16”) than standard 1/2” Eggcrate Louvers.

•  Shiplap perimeter for continuous row applications

Used in lighting, awnings, HVAC, displays and many other application. Perfect for vanity applications where the extra length is required.

•  It is recommended that the 5’ sides always be supported in continuous row applications.

Aluminum Eggcrate

Thincell™ Aluminum louvers offer a simple means of achieving a desired cut-off while maintaining compliance with strict fire codes. Stock parts are available with cell sizes of 1/2” x 1/2” x 1/2” (13 x 13 x 13mm) and 1” x 1” x 1” (25 x 25 x 25mm) each of which provide 45 degree cut-off and are available in a number of finishes and panel sizes. Cell configurations from 1/2” x 1/2” x1” (13 x 13 x 25mm) up to 2” x 2” x 2” (50.8 x 50.8 x 50.8mm) are also available to meet special lighting and ceiling requirements. Luminances are not suited for computer VDT intensive areas.

Decorative Louvers


Decorona™ 33 and 50 offer the original “circle within a square motif” that has been copied but never equaled. This marriage of geometric forms produces a pleasing array of contrasting luminances and surfaces. The parabolic cone‘s completely uniform low brightness cut-off is set off by the square cell’s slightly elevated reflections.


SLP‘s Parahex P6’s® hexagonal cells offer equally high degrees of brightness control in the parallel, perpendicular and diagonal zones. 3/4” X 3/4” X 1/2” (19 x 19 x 12,7mm) flat back cells produce less than half the luminance in the 45 degree zone than competing products.


Angleflex™ is the most sophisticated injection molded directional louver available. This louver is designed for those special applications that require highly restricted distribution in one direction, the majority of distribution in the opposite direction and 45 degree cut-off in the perpendicular plane.

Flat Sheet Lenses & Extruded Sheet

Frost LED Overlay

Frost LED Overlay is .080” thick that provides a soft white satin appearance for a variety of lighting applications. It combines high efficiency with excellent diffusing properties making it an excellent choice for LED lighting applications. Light Transmission: 95%


Prismatic Pattern 12 is undoubtedly the most widely recognized lighting medium available. This extruded lens features .187” (4,7mm) female prisms that offer excellent efficiencies while maintaining 87% of the light output in the 0-60 degree zone. PR12 is available in numerous thicknesses, materials and panel sizes.


SLP‘s extruded Prismatic Pattern 15 is designed specifically to span large openings without any objectionable sag. The 3/8” (9,5mm) square based female prisms not only provide structural rigidity but also offer an orderly appearance. PR15 is the only lens for large openings that offers high efficiencies, controlled luminance and rigidity. With a light transmission of approx. 83%. The prisms are oriented perpendicular to the width and length.


SLP‘s extruded Prismatic Pattern 19 lens offers the light control of an injection molded lens at a fraction of the cost. The 3/16” (4,7mm) square based male prisms suppresses luminance at critical angles and delivers 92% of the light output to the 0-60 degree zone. PR19 is one of the best alternatives when brightness control is a consideration but parabolic louvers are not required.

Flex Sheet

Flex Sheet is a .020” thick white matte acrylic sheet with 50% impact additive which is extremely flexible. The sheet can be used in lay-in applications, as an overlay insert perforated metal components, or can be sheared or fabricated easily into any 2-dimensional shape or pattern. Light Transmission: 65%

White Extruded Sheet

White acrylic sheet available in .040″ and .080 thickness.

Cracked Ice

Randomly patterned acrylic cracked ice sheet in .065, .070 and .125 thicknesses.  Clear or White finish and oversized panels available.

Mirror Panel

Reflective mirror panel. Film mask on face side to protect mirror from scratches during handling and fabrication

Aluminum Louvers & Baffles

Some Aluminum products are made to order and may be subject to minimum runs or set up fees.  Contact SLP Lighting for details.


Lumiflux™ 30 is a highly versatile nominal 3”/76,2mm parabolic aluminum louver that is suited to ceiling and luminaire applications. The precisely formed blades direct the light to the zones where it is most needed. Variable configurations and blade spacing offer the optimum light control for each installation. This large scale louver is available in sizes up to 63” (1600mm) square when flanged.


Lumiflux™ L14 is the industry standard 1.4” (35mm) deep parabolic aluminum louver. It is available from stock with a trimmable flange that provides a wide range of finished sizes. L14 is designed to fit most luminaires and is available in the cell configurations that satisfy typical applications. L14 louvers are regularly manufactured with special perimeter details to adapt to other requirements.

ATTB Baffle

The elemental simplicity of Aluminum Thincell™ Straight Blade baffles compliments the widest range of interior decors. The crisp 45° cut-off of the stock parts provides uniform shielding from the light source while maintaining a visual warmth not associated with parabolics. Stock parts are finished with white enamel paint, have cross blades 1” (25mm) deep, 1” (25mm) on center and are available in trimmable widths. ATTB‘s straightness and rigidity are assured by the formed side details. Custom widths, blade centers and side details are available for luminaries and ceiling applications.

LB14 Baffle

LB14 parabolic aluminum baffles are available as highly adaptable stock parts or can be manufactured to meet specific requirements. Stock parts feature cross blades either 2” (51mm) or 3” (76mm) on center and trimmable flanges that facilitate immediate shipment of parts meeting almost any dimensional requirement. These nonflammable aluminum baffles are 1.4” (35mm) deep to assure maximum luminance control. Each 4’ part begins and ends with a half cell (1” or 1-1/2”) so that the baffles can be butted end to end for a continuous appearance.

Retrofit Kits


RFK3 is a series of highly versatile nominal 3” deep parabolic aluminum retrofit kits. These assemblies are designed to be installed between an existing luminaire and the inverted tee bar ceiling system. The wide variety of cell configurations that are available assure the optimum blade spacing, cut-off and efficiency for each application. RFK3 raises the fixture 2.58” up into the plenum area.


The RFK2 retrofit kit exemplifies both simplicity and function. The sturdy steel frame is installed onto a standard inverted tee system, the luminaire returned to its original position but now on top of the frame and the door containing your choice of light control media can then be installed. The door is supported by integral pin hinges and is fastened with cam latches. The majority of louvers and all lenses can easily be adapted to fit the door. RFK2 is an easy choice for areas that contain missing, damaged and mismatched luminaire door frames.