Revolutionary Knife Edge invisible track light rail system. This versatile track system is field cuttable and can be used to finish drywall, wood or a combination of drywall and wood. Optional spot head lighting attachments for Knife Edge have a full range of mobility and are field changeable, allowing for placement adjustments throughout the rail system. Optional LED lighting engine is high performance, low power that provides outstanding reliability and color quality/consistency. 2700K, 3000K, 3500K, 4000K color temperatures are available with 95 CRI. Warm dim and tunable white LEDs are also available.