Keystone Sign Hero | LED Sign Retrofit Lamp Single-Sided | Color Select 4000K/5000K/6500K

Description

The Keystone Sign Hero Single-Sided LED Lamp is purpose-engineered for clear, even illumination in single-faced sign cabinets. Designed to replace outdated T12HO and T8HO fluorescent tubes, it delivers significant energy savings, reduced maintenance, and reliable performance even in harsh outdoor conditions.

With Keystone Color Select Technology, installers can tailor the color temperature—4000 K, 5000 K, or 6500 K—to best complement the sign’s graphics and surroundings. Whether you need warm white tones for indoor lobbies or crisp daylight white for exterior visibility, the adjustable switch makes customization effortless.

The lamp’s optical lensing system ensures precise, 180-degree forward light output—perfect for single-sided applications where illumination should be directed toward one face only. This focused distribution eliminates wasted light while maintaining uniform brightness across the entire display surface.

Installation is quick and versatile thanks to single- or double-ended power input and rotatable R17d end caps for alignment flexibility. Because the lamp operates directly on 120–277 V line voltage, there’s no external driver or ballast required—simplifying retrofit projects and reducing failure points.

Constructed from durable plastic with internal aluminum heat sinking, the Sign Hero Single-Sided series offers a 50,000-hour lifetime, minimizing downtime for service crews. At over 50% energy savings compared to fluorescent systems, these lamps deliver both environmental and operational advantages for sign owners and installers alike.

Key Features:

• Single-sided illumination with 180° beam spread

• Keystone Color Select (4000 K / 5000 K / 6500 K)

• 120–277 V input, single- or double-ended wiring

• Optical lens for optimized forward light distribution

• Rotatable R17d end caps for easy orientation

• 50,000+ hour lifetime

• UL Classified (UL 48 / UL 879A) for retrofit compliance

• 50%+ energy savings over HO fluorescents

• Operating temperature: –30 °C to 55 °C

• Optional KT-SP-10KV surge protector and KT-SH cable kits available

Performance Summary:

• Lengths: 18 – 120 in

• Wattage: 4 – 26 W

• Lumens: 480 – 3,200 lm

• Efficacy: 120–126 lm/W

• CRI > 80

• Input current: 35 – 230 mA

Applications:

• Single-sided cabinet or box signs

• Retail storefronts and directional signage

• Indoor or outdoor illuminated panels

• Monument or wall-mounted signage

Why choose Keystone Sign Hero?
Backed by Keystone Technologies’ legacy of reliability and innovation, the Sign Hero line provides a fast, cost-effective path to modern LED performance. Every lamp is rigorously tested to UL standards and built to deliver bright, dependable lighting in real-world conditions.