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Rectangular electronic ballast in a grey metal enclosure with side mounting flanges and wiring terminals

Fulham

Fulham WH5-277-L electronic ballast 13-128W 1-4 lamps

SKU CH-BYEH-KANAP

Electronic ballast operates one to four fluorescent lamps from 12 to 128 watts at 277 volts

  • Typeballast
  • Weight1.05
  • Supports one to four lamps for flexible installation
  • Operates from 13 to 128 watts covering many fluorescent types
  • Instant start at 277 V AC for quick lighting
  • Functions down to minus 22 °F for cold environments
  • Weighs 1.05 units for easy handling

Fulham WH5-277-L electronic ballast

The Fulham WH5-277-L is an electronic fluorescent ballast designed for 277 V AC input. It supports one to four lamps with a total power range of 13 W to 128 W. Compatible bulb types include DBX, T12, T5-Circuline and T8 tubes. The unit weighs 1.05 and operates down to minus 22 degrees Fahrenheit.

Practical limits of instant-start operation

This ballast uses an instant start method with no dimming capability of any type. It cannot be used with dimming controls, dimming ballasts or any dimming method. The fixed output means light levels cannot be adjusted after installation. Supported lamp wattages are limited to the listed discrete values between 12 W and 85 W per lamp.

Check your existing setup before ordering

Verify that the supply voltage is 277 V AC and that the fixtures use one of the supported bulb types. Confirm the total connected lamp wattage falls within the 13 W to 128 W range and that the lamp count is between one and four. Ensure the ambient temperature does not drop below minus 22 degrees Fahrenheit. California Proposition 65 warnings apply to this product.

Highlights

  • Supports one to four lamps for flexible installation
  • Operates from 13 to 128 watts covering many fluorescent types
  • Instant start at 277 V AC for quick lighting
  • Functions down to minus 22 °F for cold environments
  • Weighs 1.05 units for easy handling

Specifications

BrandFULHAM
Typeballast
Weight1.05

Questions about this item

How do I know if my lamps fit the 13 to 128 watt range and the one-to-four-lamp limit?

Check each lamp's wattage against the supported list — 12, 13, 15, 17, 24, 25, 28, 32, 44, 45, 55, 58, 60, 75, 80 or 85 watts — and ensure the total does not exceed 128 watts with no more than four lamps connected.

What does the 128-watt maximum mean when the ballast is installed?

It is the highest combined lamp power the unit can drive; the actual draw will equal the sum of the connected lamps' rated watts, provided each lamp type appears in the supported list.

What does the 277 V AC input require in practice?

The ballast must be wired to a 277 V AC branch circuit; it will not start on lower-voltage supplies.

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