I am building a couple of underwater lights activated by a piezo switch. The light will consist of a lead acid 12v 2.4ah battery running 3 - 220 lumen LEDs. I have the LED circuit already working. The switch needs 10 - 24v ac/dc, .4mA max. to hold the switch on or off. Max current through the switch for the LED circuit is 150mA. I plan on using a relay in here somewhere but I need to reduce current coming from the battery so I don't over power the switch. I am not super knowledgable on electronics so I need some direction. Thanks.