Screw the Vocca adapter into a lightbulb socket, and a lightbulb into the adapter. You now have a voice-activated light. Say the trigger phrase out loud, and the device will toggle the bulb on or off. Tel Aviv startup Activocal launched a Kickstarter campaign today to fund its Vocca product. It had raised more than $6,000 out of a $40,000 goal by press time.