Werma signaltechnik compact 36 led signal stack werma signaltechnik 69300055 the werma signaltechnik 69300055 is a compact 36 led signal stack the leds in this signal stack light up in the same colour as the outer domes producing a light pattern with more intensive colourthis complete signal stack solution is supplied with an input voltage of 24v dc and is supplied with the colour combination of red yellow and green werma signaltechnik 69300055 compact 36 led signal stack red yellow