IOTA ISL540 Emergency Ballast – Slim Profile Fluorescent

The IOTA ISL540 is a slim-profile emergency ballast designed for use with T5 and T8 fluorescent or 4-pin long compact lamps. It operates one lamp for 90 minutes during a power outage, providing up to 1300 lumens of initial output. With a narrow galvanized steel housing, AC output, and compatibility with low-mercury and LED retrofit tubes, the ISL540 is ideal for tight ballast compartments in plenum-rated or enclosed fixtures.

Key Features

• Operates 1 lamp: 14W–54W T5, 17W–40W T8 (incl. HO), or 36W–55W 4-pin CFL
• Initial emergency output up to 1300 lumens
• Emergency runtime: 90 minutes
• Dual voltage input: 120/277VAC, 60Hz
• AC output for lamp and LED tube compatibility
• Low-profile galvanized steel case (21.5″ × 1.18″ × 1.15″)
• Time delay circuit for end-of-lamp-life compatibility
• Includes test switch and LED charge indicator
• Open Circuit Isolation when no load is present
• 5-year warranty

Technical Specifications

• Model: ISL540
• Input Voltage: 120/277VAC, 60Hz (dual)
• Input Power: 3.5 Watts
• Initial Output: Up to 1300 lumens (1 lamp)
• Emergency Duration: 90 minutes
• Battery: Ni-Cad, 24-hour recharge, 7–10 year life expectancy
• Weight: 3.0 lbs
• Operating Temperature: 0°C to 50°C (32°F to 122°F)
• Housing Dimensions: 21.5″ × 1.18″ × 1.15″
• Mounting Center: 21.0″

Lamp Compatibility & Lumen Output

• 14W T5 – 700 lm
• 21W T5 – 850 lm
• 28W T5 – 1200 lm
• 54W T5 – 1300 lm
• F32 T8 – 1100 lm
• F40 T8 – 1150 lm
• 36–55W Long Compact CFL – 1000–1025 lm
• Compatible with select LED retrofit tubes

Certifications & Compliance

• UL Listed and CUL Listed
• Meets NEC, IBC, and NFPA 101 Emergency Lighting Codes
• RoHS Compliant
• Rated for use in damp locations and enclosed/gasketed fixtures
• AC output compatible with low-mercury amalgam lamps