JKL Wedge Based LEDs Wedge-based LEDs from JKL Components are ideal for incandescent replacement applications. Available in 5 mm (T-1 3/4) or 10 mm (T-3 1/4) packages they come in both 12 and 24 volt options. These durable LED lamps are available in a range of different colours. There is also a selection of sockets designed to work with wedge-based LEDs for replacement and new applications, for example automotive and avionics.