The R4 is a high-specification, square-shaped LED edge-lit recessed downlighter, proudly designed and manufactured in the UK. It is engineered with fire-retardant panels and available in both opal and low-glare diffuser versions to suit various visual comfort requirements. This fixture is particularly well-suited for applications in student accommodation, healthcare environments, and general-purpose spaces, offering reliable, uniform illumination.
Utilizing advanced edge-lit diffuser technology, the R4 eliminates visible LED points to provide smooth, even light distribution. It is available in two color temperature options—3000 K and 4000 K—catering to both warm and neutral lighting needs. The luminaire is supplied with a remote gear unit and a 2-meter supply lead for easy integration. For energy-saving applications, SmartScan versions are offered with TEE connectors for LCM wiring and wireless functionality, removing the need for additional control cabling—ideal for retrofit installations.
Built for recessed mounting, the R4 supports an IP54 rating from below (IP40 above the ceiling), making it suitable for use in environments where moderate protection against dust and moisture is needed. It delivers lumen outputs ranging from 1,055 lm to 2,450 lm with efficacy levels reaching up to 121.5 lumens per circuit watt. Emergency lighting versions are available with maintained operation, providing 185 to 215 lumens for up to three hours, powered by reliable Nickel Metal Hydride (NiMH) batteries.
The R4 offers a long rated life of up to 95,000 hours (L80/B10) and supports both CRI 80+ performance and full compliance with UKCA and CE standards. It is manufactured using thermoplastic materials rated to TP(a), ensuring fire safety compliance for ceiling installations. With its blend of safety, efficiency, and versatile design, the R4 is a dependable solution for modern, energy-conscious buildings.
https://www.thorlux.com/products/r4
