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Description

Keystone KT-HBLEDXXX-4F-8XX-VDIM-P /G2 XFiT LED Linear High Bay — 270W or 420W, 4000K or 5000K, 120–277V, White

The Keystone XFiT /G2 LED Linear High Bay family delivers high-output, fixed-CCT illumination across two wattage tiers for high-ceiling industrial and commercial applications. Each fixture features a frosted polycarbonate lens for uniform, glare-free light distribution, a built-in 1/2″ threaded sensor receptacle for screw-in controls, 0–10V dimming on a universal 120–277V driver, TAA compliance, DLC Premium listing, and a 10-year limited warranty.

Model Selection

Model Wattage CCT Lumens Efficacy Voltage
KT-HBLED270-4F-840-VDIM-P /G2 270W 4000K 40,500 lm 150 lm/W 120–277V
KT-HBLED270-4F-850-VDIM-P /G2 270W 5000K 40,770 lm 151 lm/W 120–277V
KT-HBLED420-4F-840-VDIM-P /G2 420W 4000K 63,000 lm 150 lm/W 120–277V
KT-HBLED420-4F-850-VDIM-P /G2 420W 5000K 63,420 lm 151 lm/W 120–277V

All models: CRI >80 | Dimming: 0–10V | Rated Life: L70 >50,000 hrs @ 25°C/77°F | Voltage: 120–277V AC

270W replaces: 750W HID · 8-lamp F54T5HO    420W replaces: 1000W HID · 12-lamp F54T5HO

Key Features

  • Two Wattage Tiers: 270W (up to 40,770 lm) for 25–40 ft ceilings; 420W (up to 63,420 lm) for 35–50+ ft ceilings.
  • CCT Choice — 4000K or 5000K: Select by SKU. 4000K neutral white for gymnasiums, retail, and occupied commercial spaces; 5000K cool white for warehouses, distribution centers, and manufacturing.
  • Frosted Polycarbonate Diffuser: Eliminates direct-source glare for uniform illumination in occupied facilities.
  • 0–10V Dimming: Compatible with commercial energy management and occupancy control systems.
  • SmartSafe Controls Ready: Built-in 1/2″ threaded sensor receptacle accepts Keystone SmartPort/Smart Loop sensors and SmartSafe emergency LED drivers — no rewiring required.
  • Location Rating: UL Listed 1598 — Dry and Damp Location.
  • Operating Temperature: −20°C to +50°C (−4°F to +122°F).
  • Certifications: UL Listed 1598, DLC Premium, TAA Compliant, N3B Trusted Manufacturer.
  • Warranty: 10-year limited warranty.

Smart & Control Features

All XFiT /G2 linear high bay models include a built-in 1/2″ threaded sensor receptacle in the driver cover for screw-in installation of Keystone sensors — no rewiring required.

Sensors/Controllers (Factory- or Field-Installable):

  • KTSL-HBFC1-UV-KO-PIR /G2 — Smart Loop Bluetooth mesh PIR occupancy sensor with built-in fixture controller.
  • KTSL-FC3-12V-PKO-PIR — Smart Loop Bluetooth mesh screw-in PIR occupancy sensor with built-in fixture controller.
  • KTSL-FC4-12V-PKO — Smart Loop Bluetooth mesh low voltage fixture controller, 12V, 0–10V Dimming.
  • KTS-PIR2-UV-KO — Standard PIR sensor. Preset: 5 min hold, 10 min standby at 10% dim, daylight disabled.
  • KTS-PIR3-12V-PKO /G2 — Smart Port screw-in PIR sensor with adjustable hold time, dim level, and standby time.
  • KTS-MW3-12V-PKO — Smart Port microwave sensor with adjustable hold time, dim level, and standby time.
  • KTS-MW3-REMOTECONTROL — Remote Control for KTS-MW3 and KTS-PIR3 sensors. Field-use only.

Emergency Backup (Factory- or Field-Installable):

  • KT-EMRG-LED-5C-500-EN /DF — 5W, 500 lm SmartSafe emergency backup.
  • KT-EMRG-LED-12C-1200-EN /DF — 12W, 1200 lm SmartSafe emergency backup.
  • KT-EMRG-LED-20SD-2000-EN /DF — 20W, 2000 lm SmartSafe emergency backup; self-diagnostic.
  • KT-HBLED-EM-BR-KIT — Emergency LED Backup Mounting Bracket Kit. Field-installable only.

Electrical

Constant-current LED driver with 0–10V continuous dimming and 12V Aux. Voltage: 120–277V AC, 50/60Hz. Power factor >0.90. THD <20%. UL Listed 1598. Mercury-free.

Construction

Architectural-grade compact steel housing with white finish. Frosted polycarbonate diffuser for uniform glare-free illumination. Built-in 1/2″ threaded sensor receptacle in driver cover. UL 1598 Listed for dry and damp locations. Operating temperature: −20°C to +50°C (−4°F to +122°F).

Dimensions: 270W — 46.50" L × 15.00" W × 2.40" H  |  420W — 46.50" L × 22.91" W × 2.40" H

Installation & Mounting

All models include V-hook and chain mounting hardware. Compatible with optional accessories (sold separately):

  • KT-HBLED-WG-3-KIT /G2 — Wire Guard Kit for 270W models.
  • KT-HBLED-WG-6-KIT /G2 — Wire Guard Kit for 420W models.
  • KT-HBLED-PM-1-KIT — Pendant Mount Kit.
  • KT-HBLED-SM-1-KIT — Surface Mount Kit.
  • KT-HBLED-CABLE-KIT — Aircraft Cable Hanging Kit.
  • KTAT-375-480-277 /SF — Step-Down Transformer, 375VA (single unit for 270W; 420W requires two units of KTAT-250-480-277 /SF).

For selectable wattage, see the KT-HBLED400PS XFiT G3 family (260/320/400W Power Select, 4000K/5000K Color Select).

Certifications & Rebates

  • DLC Premium Listed — qualifies for utility rebate programs in most U.S. markets. Verify at designlights.org.
  • UL Listed 1598 — Dry and Damp Location rated.
  • TAA Compliant — eligible for U.S. government and GSA procurement.
  • N3B Trusted Manufacturer.
  • 10-Year Limited Warranty.

Typical Applications

  • High-clearance warehouses and regional distribution centers — 25–50+ ft mounting heights depending on wattage tier.
  • Heavy manufacturing, fabrication, and industrial assembly facilities.
  • Gymnasiums, arenas, and large recreational facilities.
  • Big-box retail, wholesale clubs, and high-ceiling commercial showrooms.
  • Government, institutional, and military facilities — TAA compliant for qualifying GSA and federal procurement.

What’s Included

  • Keystone XFiT /G2 LED Linear High Bay Fixture (model and CCT per selection, White)
  • Frosted polycarbonate diffuser lens (installed)
  • V-hook and chain mounting hardware

Specifications

Documents

Item Details

MPN
KT-HBLED270-4F-840-VDIM-P /G2
MPN
KT-HBLED270-4F-850-VDIM-P /G2
MPN
KT-HBLED420-4F-840-VDIM-P /G2
MPN
KT-HBLED420-4F-850-VDIM-P /G2
Brand
Keystone Technologies
UPC
843654136806

Frequently Asked Questions

How do I choose between the 270W and 420W models?

Use mounting height and target footcandle level as your guide. The 270W models (40,500–40,770 lm) are suited for 25–40 ft ceilings in warehouses, light manufacturing, and gymnasiums. The 420W models (63,000–63,420 lm) are designed for 35–50+ ft ceilings in high-clearance distribution centers, heavy manufacturing, and arena applications. Use a photometric layout tool or consult your lighting designer to confirm spacing and footcandle targets.

What is the difference between 4000K and 5000K, and which should I choose?

Both CCTs are available at each wattage tier and are selected by model number. 4000K (neutral white) is preferred for gymnasiums, retail showrooms, and occupied commercial spaces where a warmer tone improves visual comfort. 5000K (cool white) is optimized for warehouses, distribution centers, and manufacturing facilities where high contrast improves task visibility and product inspection. CCT is fixed per fixture — not field-adjustable.

What sensors and emergency backup options are compatible?

All models include a built-in 1/2″ threaded sensor receptacle for screw-in installation — no rewiring required. Compatible sensors include the KTSL-HBFC1-UV-KO-PIR /G2 (Smart Loop Bluetooth PIR), KTSL-FC3-12V-PKO-PIR (Smart Loop screw-in PIR), KTS-PIR2-UV-KO (standard PIR), KTS-PIR3-12V-PKO /G2 (Smart Port PIR), and KTS-MW3-12V-PKO (Smart Port microwave). Emergency backup options: KT-EMRG-LED-5C-500-EN /DF (5W), KT-EMRG-LED-12C-1200-EN /DF (12W), and KT-EMRG-LED-20SD-2000-EN /DF (20W, self-diagnostic).

Can these fixtures be used in a 480V facility?

Yes — with step-down transformers. For 270W models, a single KTAT-375-480-277 /SF (375VA) is sufficient. For 420W models, two KTAT-250-480-277 /SF units (250VA each) are required, as the 420W load exceeds a single 250VA transformer.

Are these fixtures DLC Premium listed and TAA compliant?

Yes — all four models in this family are DLC Premium listed and qualify for utility rebate programs in most U.S. markets. Visit designlights.org and search by model number to confirm available incentives. All models are also TAA compliant and eligible for U.S. government, GSA, and institutional procurement programs.
keystone-technologies-brands - Bees Lighting

Keystone Technologies

For over 75 years, Keystone Technologies has been a leader in the lighting industry, operating under a simple yet powerful philosophy: "Light Made Easy." The brand is dedicated to creating high-quality, reliable, and user-friendly lighting solutions for commercial and industrial applications. With a massive portfolio of lamps, fixtures, and controls, Keystone is the trusted, go-to partner for contractors and lighting professionals seeking performance and simplicity.

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Hosep K.

Easy to install, it's slim light, and clean fit. Not to mention the brightness and easy access for maintenance and future add.

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John Wusinich

High quality brand and works well with our other fixtures.

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Rebecca Furlong

One of the leading brands for these types of fixtures. You will not regret buying this for sure.

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Jeffrey Downes

Order came in complete with all accessories needed.

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Patrick Sheridan

One of the leading brands for these types of fixtures. You will not regret buying this for sure.

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Thomas Cheslik

Great quality and the materials used are impressive. Finish looks great.

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Ryan C.

Looks good nice bright light

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Lyndon H.

Great Product!!

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Robert R.

Great light light for the shop. Super bright!! And the price is great.

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John c.

Fast shipping good pricing .Easy install. Thanks .Need 30 day account to purchase faster.

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Mickey K.

Wow what a difference they made will be ordering 4 more soon.

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Austin B.

24,000 lumen high bays (MLH)_

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Garry Smith

These lights are amazing! I will definitely purchase these in the future.

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Randy N.

The fixture doubled our ambient light levels in our race shop and cut our power consumption by two thirds. Ordering was very easy and we received the fixtures promptly. We are return customers and recommend Bees Lighting to anyone serious in obtaining lighting products. Great selection available. Randy Nickerl VT Construction Las Vegas NV

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Eric B

I bought six of these for my 40X40 garage. Incredibly bright, easy to install and come on instantly. Absolutely recommend these to anyone looking for High Bay lighting.