Binay Opto Electronics Private Ltd. Manufactures LED Tower Light. Binay Opto Electronics Private Ltd also offers LED based pilot lights, aviation obstruction lights, alarm lights, etc. LED Tower Light consists of separate WL-2 units stacked one on top of the other in a modular form. Modular units are available in red, green, yellow, orange blue and pure white colours, in voltage ratings of 6V, 12V, 24V, 48V, 110V AC/DC, and in 220VAC or 415VAC. It is also available with an audio module.