New generation office lighting combines state-of-the-art ActiveLED, electronic and mechanical design for ceiling applications where the recessed light fixture is an integral part of the air circulation from the workspace below the ceiling up into the Plenum space above

The ActiveLED^® OL4 Plenum Air Return Series Troffer / Recessed Panel Light consumes at least 50-85 percent less energy than conventional lighting and additional energy savings can be achieved with optional light management.

With its patented design and superior LED elements, the ActiveLED OL4 Plenum Air Return Light is a reliable light source with a 90,000-hour lumen life, making it a maintenance-free solution for applications where changing bulbs and ballasts can be costly and hazardous.

Significant savings from not having to maintain and renew ballasts and fluorescent tubes in light fixtures, reduced heat generation and energy use justify the initial outlay.

NEW! HEPA Filter Option

Now you can have less pollen and other airborne particles filtered out before they get into your return air system. The replaceable HEPA filter can effectively filter pollen, micro organisms and viruses before they reach your return air system. One filter will last for up to 3 months in a heavy use office environments.

Product Overview, OL4 2' x 4' Imperial Fixtures

Ringdale provides five sizes of ActiveLED Plenum Air Return Vented Troffer Lights in the 2' x 4' ceiling grid format from 24 to 96 LED Watt fixtures for different applications and each with a choice of CCT Color Temperatures - 2700K, 3000K, 3500K, 4000K or 5000K. All OL4 Plenum Series troffers include ActiveLED digital management as standard and optional support for a Battery Backup Unit (BBU).

Imperial Product	Application	Fixture Wattage	Light Output	Imperial Size
OL4U-RTP-50R24	Office Light	26 Watts	3,000 Lumens	23.87" x 47.87"
OL4U-RTP-50R36	Office Light	38 Watts	4,300 Lumens	23.87" x 47.87"
OL4U-RTP-50R48	Office Light	52 Watts	5,900 Lumens	23.87" x 47.87"
OL4U-RTP-50R72	Office Light	75 Watts	8,400 Lumens	23.87" x 47.87"
OL4U-RTP-50R96	Office Light	102 Watts	12,000 Lumens	23.87" x 47.87"

Product Overview, 600mm x 1200mm Metric Fixtures

Ringdale provides five sizes of Professional ActiveLED Plenum Air Return Vented Panel Lights in the 600mm x 1200mm ceiling grid format for different applications and a choice of CCT color temperatures - 2700K, 3000K, 3500K, 4000K or 5000K. All OL4M Drop-in Series troffers include ActiveLED digital management as standard and optional support for a Battery Backup Unit (BBU):

Metric Product	Application	Fixture Wattage	Lumen	Metric Size
OL4MU-RTP-50R24	Office Light	26 Watts	3,500 lm	59.5cm x 119.5cm
OL4MU-RTP-50R36	Office Light	38 Watts	5,100 lm	59.5cm x 119.5cm
OL4MU-RTP-50R48	Office Light	52 Watts	7,100 lm	59.5cm x 119.5cm
OL4MU-RTP-50R72-H	Office Light	76 Watts	10,600 Lumens	59.5cm x 119.5cm
OL4MU-RTP-50R96	Office Light	102 Watts	13,500 Lumens	59.5cm x 119.5cm

ActiveLED^® Technology

Ringdale uses the latest in energy efficient LEDs and LED Modules producing equal or greater light output than fluorescent light fixtures. Our state-of-the-art electronics monitor current and temperature of the substrate to assure maximum performance under the prevailing environmental conditions and a Lumen Lifetime of 90,000 hours (90% Luminous Flux).

ActiveLED^® Diffuser Technology

We use state-of-the-art diffuser technology with a minimal amount of light loss in the fixture providing for maximum lighting efficiency.

ActiveLED^® Architectural Features

Ringdale Plenum Air Return Recessed Lights are about half the height of a conventional fluorescent light fixture and half the weight, putting less stress on the straps and strips supporting the dropped ceiling.

ActiveLED^® Warranties

We provide mechanically robust indoor lighting systems; our warranties are 10 years on LED elements, fixtures and power supplies / drivers.

Ringdale is an ISO 9001:2018 company. Ringdale provides products of the highest quality designed and manufactured in Texas, USA and in the United Kingdom.

OL4 Plenum Air Return Vented Series Sample Part Numbers - Imperial Models
OL4U-RTP-A50R24WH, 24/26 Watt 5000K
OL4U-RTP-A50R36WH, 36/38 Watt 5000K
OL4U-RTP-A50R48WH, 48/52 Watt 5000K
OL4U-RTP-A50R72WH, 72/78 Watt 5000K
OL4U-RTP-A50R96WH, 96/102 Watt 5000K

OL4M Plenum Air Return Vented Series Sample Part Numbers - Metric Models
OL4MU-RTP-A50R24WH, 24/26 Watt 5000K
OL4MU-RTP-A50R36WH, 36/38 Watt 5000K
OL4MU-RTP-A50R48WH, 48/52 Watt 5000K
OL4MU-RTP-A50R72WH, 72/78 Watt 5000K
OL4MU-RTP-A50R96WH, 96/102 Watt 5000K

Technical Information

Input Voltage:	• Auto-sensing, 100..277 Volts AC, 50/60Hz • Digital Power Source, dedicated circuit strongly recommended
Power Consumption: Power Statistics:	See table for details Dependent upon model: • 26 to 102 Watt Fixtures • 24 to 96 Watt LEDs
Ceiling Grid:	Imperial = 2' x 4' Metric = 600mm x 1200mm
Fixture Dimensions: Fixture Height:	Imperial = 23-7/8" x 47-7/8". Metric = 595mm x 1195mm. • 2.5" without power supply (6.4cm) • 4.5" with power supply (11.4mm)
Weight:	19.5 lbs, 8.8 Kg
Operating Temperature:	-50..+65° C (-58..+149° F)
CCT Color Temperatures:	Choice of 2700K, 3000K, 3500K, 4000K and 5000K, in accordance with ANSI C78.377A
Listings & Tests:	cUL listed driver, CE, suitable for interior locations. RoHS compliant. IP64 Rated optical assembly. LM-79 and LM-80 info available. Conforms to FCC Part 15.19 Subpart B Class A. Made in USA - ARRA Compliant.

Caution! All specifications published herein are subject to change without notice. See website ActiveLED.com for Terms and Conditions of use of the website and the information provided herein. See Ringdale website on www.ringdale-technology.com for Terms and Condtions of Sale and Service.