Binay Opto Electronics Private Ltd. Manufactures Flasher and 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. Flasher and Integral LED Indicators are available as UniMidi, MultiMidi, 16-L and Jumbo Modules. These have an in-built circuit which causes the Module to flash at a rate of 2-4 Hertz when the rated input voltage is applied. This is effective for drawing attention, and these indicators are suitable for positions which require to be attended immediately.