What Is a Shorting Cap and Why Do You Need One? When retrofitting fluorescent fixtures with LED tubes, bypassing the existing ballast is often the recommended approach for maximum efficiency and longevity. The ORTECH Shorting Cap (SB-SHORTING CAP) is the professional-grade solution designed to safely complete the circuit on tombstone lamp holders when the ballast is removed or bypassed during a direct-wire (ballast-bypass) LED installation. Wide Voltage Compatibility Rated for 100V to 480V , this shorting cap is built to handle virtually any standard North American commercial or industrial electrical environment — from small retail spaces to large warehouses and industrial facilities. Whether you're working on a 120V residential circuit or a 277V/347V/480V commercial system, this cap delivers reliable performance every time. Fast, Safe & Code-Compliant Installations Designed for electricians and lighting contractors who value speed and safety, the ORTECH Shorting Cap simply snaps onto the non-shunted or shunted tombstone socket to bridge the contacts and allow current to flow through your new LED tube without any ballast in the circuit. It eliminates the need for wire splicing on the socket end, resulting in a cleaner, faster, and safer retrofit. The Smart Choice for LED Retrofits Across Canada At just , this small but essential accessory can save hours of labour on multi-fixture installations. Available from Lumibox, Canada's trusted LED lighting distributor.