LP15 & LP2 Series Illuminated Pushbuttons The E-Switch LP15 and LP2 Series Illuminated Pushbuttons offer five different illumination colors, custom marking options, and multiple cap options. Competitively priced, the LP15 and LP2 Series are an attractive buy with a 300,000 cycle mechanical life. E-Switch's LP15 and LP2 Series Illuminated Pushbuttons are ideal for audio/visual, medical, telecommunications, consumer electronics, test instrumentation, computer, server, and peripheral applications.