Keystone Instant-Start T8 Ballast for 3-4 Lamps – 120–277V

Operates 3 or 4 F17, F25, F32 T8 lamps (including U-bend equivalents)

Instant-start with normal ballast factor for stable, flicker-free lamp startups

Universal 120–277 V input supports diverse installation environments

Provides 3–5% energy savings over standard non-premium ballasts

Compact form ideal for retrofit, troffer, warehouse, or commercial lighting setups

Covered by Keystone’s 5-year warranty for long-term reliability