CH1 Series

LED High Bay Fixtures

The new CH1 Series is a range of High Bay LED fixtures with features contractors value the most: quality, reliability and performance in a cost-effective design. The CH1 Series takes our award-winning technology from the Essentials Series 4.0 and puts it into a more value-centered platform.

Models available with 2, 4 and 6 LED modules to deliver a lumen range from 6,000 to 35,000 lumens, up to 171 lumens per watt and an ultra-long life up to 201,000 hours (L70 via TM-21).

Applications: industrial and manufacturing facilities, warehouses, distribution centers, hangars and indoor sports.

Technical Specifications

Typical values1


Lumen OutputEfficacyWattsFramePart Number
20,7001681244MS CH10S-A1-20K-4MS
25,0691631544MS CH10S-A1-24K-4MS
27,7491551794MS CH10S-A1-27K-4MS
30,8521591946MS CH10S-A1-30K-6MS
34,9061572226MS CH10S-A1-35K-6MS

Lumen Maintenance

Projected L70 via TM-21 (24/7 operation)


@ 25°C Ambient Temp.@ 45°C Ambient Temp.
>201,000 hours>183,000 hours

Ambient TempYear 1Year 5Year 10

1Typical at 277V (LV) and 25°C (77°F), 5000K , Clear Lens, +/-10%. Typical CRI 80+. 4000CCT Multiplier is 0.97. Frosted or Aisle Lens Multiplier is 0.96. 3500K Multiplier is 0.93

Power & Control
  • Power input: 120-227V or 347-480 (50/60Hz), Typical, depending on model.
  • Dimming: 0-10V dimming standard. Capable of dimming down to 10%.
  • Power Factor: Greater than 0.9 (0.96–0.99 typical)
  • Total Harmonic Distortion: Less than 20%, 10% typical
  • Occupancy Sensors: Optional – factory installed photocell and daylighting sensors..
  • Emergency Battery Backup: Two models available, producing 2,000lm and 2,200lm for a minimum 0f 90 minutes.
  • Surge Protection: Standard is 6kV, additional surge protection up to 10kV is available.
  • Driver Quick Disconnect: A Driver Quick Disconnect feature is available as an additional option.
  • Environment: Dry/Damp for interior applications (IP4x). Impact Protection (IK08).
  • Ambient Range Operation: -40°C up to 45°C (-40°F up to 113°F*).
  • Heat Sinks: Extruded aluminum heat sinks provide optimal thermal management, decreasing LED
    junction temperature and ensuring long life and high efficacy.
  • Power Supply Access: Wireway cover allows for easy access and quick wiring. Center hole accepting 3/4” stem and also 1/2” KO’s, one on each end of the wire way, on top.
  • Mounting: Fixture is cable ready (CRM) and has a center opening to accept a 3/4” stem mount, HOOK or surface mount options (with optional MBR). MBR reduces ambient range by 5°C when mounted flush to junction box.
  • LENSES: UV stable polycarbonate clear and aisle or acrylic (PMMA) frosted available.
  • CCT: 3500K, 4000K and 5000K standard, other CCT available.
  • Warranty: 5-year standard.
Listings & Certifications
  • ETL listed (UL 1598)
  • RoHS Compliant
  • DesignLights™ Consortium Premium
  • EMI: Title 47 CFR 15 Class A and ICES-005
  • LM-79, LM 80 tests and reports are performed in accordance to IESNA standards, per TM-21