Binay Opto Electronics Private Ltd. Manufactures Self-Contained 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. Self-Contained Integral LED Indicators or JUMBO Integral LED Module is available in all voltage ratings up to 440VAC or 220VDC. It has input cable termination by screw terminals. These are used for indications on electrical control panels and control desks. These are available in variable sizes having the diameters of 22.5mm, 25.5mm, 27.5mm, 30.5mm, and 19.5mm.