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Color: White


Replaces 250W MH high bays

Reduces energy consumption by 67%

100,000-hour LED lifespan

5-Year, No-Compromise Warranty

LED Info

  • Watts:
  • Color Temp:
  • Color Accuracy:
  • L70 Lifespan:
  • Lumens:
  • Efficacy:
  • 78W
  • 5100K
  • 71 CRI
  • 100000
  • 11127
  • 125 LPW

Driver Info

  • Type:
  • 120V:
  • 208V:
  • 240V:
  • 277V:
  • Input Watts:
  • Constant Current
  • 0.82A
  • 0.52A
  • 0.45A
  • 0.4A
  • 89W


Weight: 21.0 lbs

EZ Layout

EZ Layout

Technical Specifications


  • BAYLED78 with Bi-Level Operation:
    Allows 33%-66%-100% output modes
  • Patents:
    The design of the BAYLED™ is protected by patents pending in US, Canada, China, Taiwan and Mexico
  • Accessories:
    Available accessories include protective polyshield and wire guards, replacement lens and doorframe, and an occupancy sensor. Click here to see all accessories.
  • Equivalency:
    Equivalent to 4 lamp T8 fixtures
  • Buy American Act Compliance:
    RAB values USA manufacturing! Upon request, RAB may be able to manufacture this product to be compliant with the Buy American Act (BAA). Please contact customer service to request a quote for the product to be made BAA compliant.


  • UL Listing:
    Suitable for damp locations with cord and hook. Suitable for wet locations with 3/4" pendant stem. Covered ceiling mount only.
  • IESNA LM-79 & LM-80 Testing:
    RAB LED luminaires and LED components have been tested by an independent laboratory in accordance with IESNA LM-79 and LM-80.

LED Characteristics

  • LEDs:
    Three multi-chip, 26W high-output, long-life LEDs
  • Lifespan:
    100,000-hour LED lifespan based on IES LM-80 results and TM-21 calculations
  • Color Consistency:
    7-step MacAdam Ellipse binning to achieve consistent fixture-to-fixture color
  • Color Stability:
    LED color temperature is warrantied to shift no more than 200K in CCT over a 5 year period
  • Color Uniformity:
    RAB's range of CCT (Correlated Color Temperature) follows the guidelines of the American National Standard for Specifications for the Chromaticity of Solid State Lighting (SSL) Products, ANSI C78.377.2011.


  • Drivers (3):
    Constant Current, 720mA, Class 2 with 6kV surge protection, 100-277VAC, 50/60 Hz
  • THD:
    11.5% at 120V, 12.3% at 277V
  • THD:
    7.2% at 120V, 16.2% at 277V
  • Power Factor:
    98.8% at 120V, 91% at 277V


  • Ambient Temperature:
    Suitable for use in 55°C (131°F) ambient temperatures
  • Thermal Management:
    Superior thermal management with external air-flow fins
  • Housing:
    Precision die-cast aluminum housing and door frame with 3-foot 600V power cord
  • Mounting:
    Heavy-duty 3/4" NPS hook and 3 foot safety chain
  • Recommended Mounting Height:
    25 ft
  • Lens:
    Tempered glass
  • Reflector:
    Specular vacuum metallized polycarbonate
  • Gaskets:
    High-temperature silicone
  • Finish:
    Formulated for high-durability and long lasting color
  • Green Technology:
    Mercury and UV-free. RoHS compliant components. Polyester powder coat finish formulated without the use of VOCs or toxic heavy metals.