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

Description The Keystone Sign Hero Double-Sided LED Sign Lamp is a professional retrofit solution designed for high-visibility, energy-efficient sign illumination. Whether you manage storefront cabinets, monument signs, or roadside displays, this LED replacement outperforms traditional T12HO and T8HO fluorescent lamps with superior brightness, reliability, and ease of installation. Built with Keystone’s Color Select Technology, each lamp allows users to choose between 4000 K, 5000 K, or 6500 K color temperatures with a simple switch, ensuring the perfect tone for every application—from crisp daylight white to cool white for enhanced contrast. The lamp’s advanced optical lens evenly distributes light through the sign face, eliminating hot-spotting and shadowing commonly seen with fluorescent systems. Unlike conventional systems that rely on external ballasts, this LED tube is direct-drive (120–277 V) and supports single- or double-ended wiring. Installation is straightforward—simply wire into the existing sockets within the sign’s ballast raceway. With rotatable end caps, installers can easily align the beam spread for optimal light output, ensuring consistent 360° coverage across the entire sign face. The durable polycarbonate construction and integrated thermal management system deliver a 50,000-hour rated lifetime, cutting maintenance labor and replacement costs dramatically. With energy savings of over 50% compared to HO fluorescent lamps, you’ll see fast payback through reduced electricity consumption and fewer service calls. Keystone’s Sign Hero Double-Sided lamps are UL Classified and evaluated to UL 48 / UL 879A standards, guaranteeing safety and compliance for commercial sign applications. Operating temperatures range from –30 °C (–22 °F) to 55 °C (131 °F), making them suitable for outdoor environments across all climates. Key Features: Double-sided illumination for even lighting on both faces of cabinet signs Keystone Color Select (4000 K / 5000 K / 6500 K) Advanced optical lens for uniform light distribution 120–277 V input; single- or double-ended wiring 360° beam spread Rotatable R17d end caps for directional control Over 50% energy savings vs fluorescent T12HO/T8HO 50,000 hour lifetime UL Classified for LED sign retrofit (UL 48 / UL 879A) No external driver required Compatible with optional KT-SP-10KV surge protector and KT-SH cable kits to prevent lamp sagging in long runs Performance Summary: Nominal lengths: 18 in to 120 in Wattage range: 7 – 52 W Lumens: 900 – 6,400 lm Efficacy: 120–129 lm/W CRI > 80 Input current: 60 – 460 mA Applications: Double-sided cabinet and pylon signs Retail plazas and gas stations Building-mounted light boxes Outdoor commercial displays Why choose Keystone Sign Hero?Keystone Technologies has built a reputation for dependable lighting products backed by strong engineering support. With Sign Hero, you gain a retrofit solution that installs fast, performs brilliantly, and withstands demanding environments—all from a trusted North-American manufacturer.