RAB LED A21 Lamp Medium E26 Base 17W CCT Selectable 3000K/4000K/5000K 90 CRI 120-277V (A21-17-E26-9CCT-DIM-UNV)

A premium field-adjustable HID retrofit lamp — the modern replacement for legacy mercury vapor, metal halide, and high-pressure sodium installations. The A21-17-E26-9CCT-DIM-UNV combines field-selectable color temperature, full-range dimming, and a 5-year warranty in a single SKU that simplifies specification across mixed-CCT projects.

A dip switch inside the lamp lets installers select 3000K, 4000K, or 5000K at install — one part number covers warm, neutral, and cool requirements. Output ranges from 2,200 to 2,350 lumens depending on CCT, all at 90+ CRI. Precision die-cast aluminum heat sink, frosted polycarbonate lens, and a universal-voltage driver with 4kV surge protection make it field-ready for outdoor and demanding indoor environments.

Features

• 17W LED — 125W incandescent equivalent
• Field-selectable CCT via dip switch: 3000K / 4000K / 5000K
• 2,200lm @3000K / 2,350lm @4000K / 2,300lm @5000K; 90 CRI
• Universal voltage: 120–277V AC
• Dimmable: Step 75–100% or TRIAC 20–100%
• UL Type B ballast bypass installation; integral driver wires directly to line voltage
• IP54 ingress protection rating; 4 kV surge protection
• Operating temperature -40°F to 113°F
• 50,000-hour LED lifespan (L70 per IES LM-70)
• UL Listed and UL Classified; suitable for enclosed fixtures in dry and damp locations
• California Title 20 Compliant and Title 24 JA8 Compliant; lawful for sale in California
• DLC family-listed (refer to DLC QPL for specific SKU qualification)

Ideal For: HID Retrofit Projects • Post Tops • Bollards • Outdoor Corridor Lighting • Mixed-CCT Commercial Specifications • Utility-Rebate Projects

HID retrofit installation requires bypassing the existing ballast (UL Type B). Color stability is warrantied to shift no more than 200K over a 5-year period. Compatible base extension accessory: HID-ACC-EX39 (sold separately). Backed by RAB's 5-year limited warranty covering light output, color stability, driver performance, and finish.