Fluorescent Emergency Ballast – 500 Lumens, 120/277V, Time Delay | UL 924

Fluorescent Emergency Ballast – 500 Lumens, 120/277V, Time Delay | UL 924

The BAL500TD fluorescent emergency ballast operates one lamp in emergency mode for 90 minutes with a maximum output of 500 lumens. Designed for field or factory installation, this UL 924 Listed unit includes a long-life NiCd battery, test switch, LED charge indicator, and built-in time delay to accommodate end-of-life ballast shutdown. Its compact steel housing makes it compatible with a wide range of fluorescent fixtures, including sealed and gasketed models.

Download BAL500TD Emergency Ballast Spec Sheet (PDF)

Features & Benefits

• 500 lumens emergency light output
• Operates one fluorescent lamp for 90 minutes
• Works with or without an AC ballast
• Integrated time delay for end-of-life circuit protection
• Dual-voltage input: 120/277V
• Test switch and LED charge indicator included

Electrical Specifications

• Input Voltage: 120/277V
• Input Power: 2.5W (120V), 2.7W (277V)
• Input Current: 0.27A (120V), 0.25A (277V)
• Battery: 2.4V NiCd, rechargeable and maintenance-free
• Recharge Time: 24 hours

Mounting / Installation

• Mounts inside, on top, or remotely from the fixture
• Remote mounting up to 50 feet (see ballast-to-lamp specs)
• Suitable for both switched and unswitched fixtures

Housing / Dimensions

• Painted white steel housing
• Dimensions: 9.4" L × 2.4" W × 1.5" H
• Compact form factor fits most fluorescent fixtures

Compliance & Warranty

• UL 924 Listed for factory or field installation
• Complies with NFPA 101, NEC, OSHA, and state codes
• UL Listed for damp locations (0°C to 50°C)
• 5-year warranty (excluding lamps)

Frequently Asked Questions

How many lamps does this ballast operate in emergency mode?

It is designed to operate one fluorescent lamp for 90 minutes at up to 500 lumens.

Can I install this in sealed fixtures?

Yes. It is suitable for use in sealed and gasketed fixtures and rated for damp locations:contentReference[oaicite:1]{index=1}.

Does it support remote mounting?

Yes. You can mount it remotely up to 50 feet away, provided it meets AC ballast-to-lamp guidelines:contentReference[oaicite:2]{index=2}.

What’s the purpose of the time delay feature?

Time delay ensures proper operation in fixtures with end-of-life lamp shutdown circuits, helping maintain emergency illumination integrity.

Is it compliant with UL and NEC requirements?

Yes. The BAL500TD is UL 924 Listed and meets NEC, NFPA 101, OSHA, and most local codes:contentReference[oaicite:3]{index=3}.

Product Features

• Brand: Best Lighting
• Product: BAL500TD
• Ballasts