Flexible design: variable length light engines up to 4 feet available at 500 to 1500 lm/foot. High efficacy: >180 lm/W @ 500 lm/foot, >160 lm/W @ 1000 lm/foot. Continuous LED pitch from board to board, eliminating dark spots. Aluminium core PCB offered in all light engines for excellent heat dissipation. CCT options, ranging from 2600–6500K, up to 3-step MacAdam available.