Citadel Enclosures

Protecting lighting against harsh environments. Components for LED and Fluorescent based units.

Profile Series

The new sleek Profile Enclosure exclusively from SLP to meet all your lighting needs.


Unique round products exclusively from SLP for high and low bay applications the new CircLED general high bay.

Louvers, Lenses & Eggcrate

Plastic Parabolic, Decorative, Aluminum, Thincell Eggrate louvers. Block LEDs and other forms of lighting with flat sheet lenses. SLP products to cover all your office and retail needs.

General Lighting

Items for General Lighting such as replacement lenses, wire guards and more.

Complimentary Components

Components and products to use with SLP’s lighting to expand upon your needs such as remote gear boxes and more.

What's New at SLP Lighting:

SLP is always striving to improve upon and create the highest quality lighting components in the market. Check here to see new products as well as  updates on improvements to products. Also see where SLP will be in the coming year.


SLP is bringing a new look to enclosures for low bay linear LED Lighting! A sleek latchless, co-extruded gasketed enclosure, the PROFILE I has so much to offer! Check it out!

Introducing SLP’s The CircLED is a thermally conductive molded polymer high bay, offering a lighter weight alternative to die cast fixtures, while thermally managing up to a 200 Watt LED Engine.Check it out!

Lighting the Way through Quality

As a commitment to our customers, SLP continues to invest heavily in research and development along with the very latest technology in our plants. Not only do our products begin with our own in house testing on prototypes and samples then UL Approved and Certified. Our facilities are ISO 9001:2015 Certified. This enables SLP to assist our customers in meeting the everyday challenges in an ever changing global marketplace.

In Business Since 1969

SLP has been serving the lighting industry since 1969. The first lighting company to have both injection molding and metalizing under one roof to ensure proper quality throughout the entire process.

Beginning-to-End Service

A leader in developing and manufacturing a full range of lighting solutions and innovative products. Our services include Engineering, Design, Prototyping, In-House Testing, Manufacturing, Distribution and more! From concept to reality with the customer and end user’s in mind through the entire process.

About Us

In 1969, Koller Enterprises Inc. bought the plastic louver business of MSL Industries and formed Scientific Lighting Products(SLP). SLP started with three different louvers and based on customer needs, expanded and refined the offering of plastic louvers, metal louvers and weatherproof enclosures.

The SLP engineering team has continuously followed the lamp source from T12 to T5 to LEDs. Each of our products are tailored to the latest technology and are designed to utilize the newest light sources to their fullest.  Our Heat Lab, IP Test Booth and Goniometer assure that our products will meet the ever changing needs of the market.

Koller Enterprises Companies

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Contact Us

Headquarters & International Sales:

SLP Lighting
1400 South Old Highway 141
Fenton, MO 63026 USA
Phone: 636.600.4084
Fax: 636.660.8109


Manufacturing & Logistics:

SLP Sullivan
1005 N. Service Road West
Sullivan, MO 63080
Phone: 573.468.3181

USA Distribution

SLP Central (Headquarters)
Phone: 636.600.4084

SLP West
16423 Berwyn Road
Cerritos, CA 90703
Phone: 562.404.1440
Fax 1.562.404.4711

SLP North East- R&R Direct:
62- 70 Myrtle Avenue
Passaic, NJ 07055
Phone: 1.800.248.0224


Canada – Mackenzie Associates
1721 Bishop Street N
Unit 9-10
Cambridge, ON N1T 1N5

Unit 11, Faraday Road
Rabans Lane Industrial Estate
Aylesbury, Bucks HP198RY England
Phone: 011.441.296.428.822
Fax: 011.441.296.428.823


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