5.3 LED Sizes

The two most common LED sizes are known as T-1 and T-1 3/4. T-1 is small 3 mm diameter device, while T-1 3/4 is standard 5 mm diameter device. LEDs are also available in tiny SMD format, mounted on PCBs, and as right-angle devices for mounting on a PCB. Special brackets are available for mounting on panels or as boxes.

Table 5.2 Some LED specifications.