Binay Opto Electronics Private Ltd. Manufactures Arrowhead Integral LED Indicators. Binay Opto Electronics Private Ltd. Binay Opto Electronics Private Ltd. Also offers LED based pilot lights, aviation obstruction lights, alarm lights, etc. Arrowhead Integral LED Indicators is used for applications such as up/down indicators in elevators, turn indicators in vehicles, process flow indication in mimic panels, direction indicators, etc. It is a standard form and is used for 9.5mm panel cutout. Its top is formed into an arrowhead shape.