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SLFTL4 Tubular Daylighting System

LightFlex Quad-Tube Tunable-White LED Daylighting System

By Sunoptics

    Tunable WhiteBuy America(n)
  • Overview
  • Specifications

The LightFlex™ LED daylighting system from Sunoptics® delivers natural light into interior dropped-ceiling applications and supplements daylight with tunable-white LED technology. It is the industry’s first LED tubular daylighting system with integrated controls to provide natural light, tunable-white LED light or a combination of both — in the same system.

The LightFlex LED Quad system consists of four highly-reflective (98% reflective MIRO-SILVER®) tubes extending from one roof penetration, to deliver natural daylight and/or electric light to four luminaires. It delivers the same amount of light as four single tubular daylighting devices (TDDs), but with only one skylight.

LightFlex LED uses our 3-step system (Capture, Transport and Distribute) to optimize daylight when available. The embedded daylighting sensor detects the natural light and triggers lighting controls to adjust and supplement daylight, only when electric light is needed. Integrated nLight® wired controls enable the sensor, louver and luminaire to adjust, supplement, and maximize natural light and tunable-white LEDs.

Whether automated or manual, the result is an adaptable, fully-responsive indoor visual environment. Click here for everything LightFlex LED!

  • Reduces installation cost/time with one roof penetration
  • Simplifies design to implement daylight harvesting
  • Provides access to natural light throughout the day
  • Provides tunable-white (2700k-6500k) LED as needed
  • Multiple diffuser/lens choice
  • Reduces clutter in the ceiling and redundant lighting systems

Listings: Signature skylight is HVHZ Approved. FM Approved. AAMA Certified. NFRC Certified. UL Certified to meet U.S. and Canadian standards.

Click here to open our LENS-GLAZING SELECTION TOOL to assist you in selecting the ideal lens type for your project's location.

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Light Source Daylight, LED - Dynamic
Dynamic Feature Tunable White
CCT / LED Color Variable
CRI 80, 90
Compliance Listing BAA, ROHS
Environmental Listing Hail Rating Class 1, Hail Rating Class 3, Hail Rating Class 4
Regulatory Listing AAMA, FM, UL
Product Type Tubular Daylighting
Voltage Rating 110, 120
Lens/Diffuser Material Acrylic, Plastic, Polycarbonate
Primary Material Acrylic, Polycarbonate
Series SLFTL4

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  • Suggested Replacement Products


  • Spec Sheets

    Document Type Document Title Description Updated View
    SPEC SHEET SLFTL4 LightFlex LED.pdf Specification Sheet for Sunoptics Quad-Tube LightFlex LED Commercial Daylighting System 1/6/2021 View
    SPEC SHEET Sunoptics CSI Spec Sheet.docx CSI Specifications for Sunoptics Skylight Products. rev 2020 5/21/2020

    Create Submittal Spec Sheet

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  • Technical Documents (e.g. Instruction Sheets, MSDS, CAD)

    Document Type Document Title Description Updated View
    Installation Instructions SLFTL2-SLFTL4_LightFlexLED_Duo-Quad_Installation Instructions.pdf Installation Instructions for LightFlex LED DUO and QUAD tubular daylighting system 3/18/2020 View
    User Manual LightFlex LED nLight Programming Guide.pdf LightFlex™ Tunable-White LED nLight® Programming guide View
    User Manual nTune Tunable White Programming Guide.pdf nTune Tunable White Programming Guide View
  • Utility Rebate Search

  • Replacement Parts

  • Confidential Documents

  • Marketing Material (e.g. Brochures, Sell Sheets, FAQs, )

    Document Type Document Title Description Updated View
    Brochures Sunoptics LightFlex LED_Brochure.pdf LightFlex™ LED Brochure View
    White Paper Eneref Report_Classrooms Optimized w-Daylight-LED.pdf Eneref Institute report: Classrooms Optimized with Natural Daylight Increase Student Performance 4/2/2019 View
  • Need Product Assistance? (e.g. How to Buy, Technical Support, Warranty)

    How to Buy

    Sunoptics products are primarily sold through a network of agents and distributors.

    Technical and Design Support

    The Sunoptics team is dedicated to providing outstanding support giving each project design and installation individual attention.  Should you have any questions, email our technical support team:

    Quote Requests and Order Inquires

    For quote inquires, email our inside sales team:

    For order inquires, email our customer care team:

    Product Warranty

    • Click Here for Product Terms, Conditions and Warranties


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Product Family


Lightflex LED Tubular Daylighting ...

The LightFlex™ LED (SLFTL) from Sunoptics® is the industry’s first tubular daylighting system with integrated tunable-white LEDs...

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