Audio notifications from your iPhone are handy, but not always appropriate for the situation you’re in. And visual notification is limited to lighting up the flash, which is obnoxious at best. Now there’s a third option: Lunecase. This is a Kickstarter project from Concepter, a Ukranian company, for a really thin shell-style case with two light-up icons on the back: one for a phone call, and one for a text message. Here’s the catch: It’s using existing energy from your iPhone, so it isn’t going to drain your battery or go dead itself. It’s officially funded, but there’s still time to get in at the US $39 level, a discount from the expected retail price of $50. Click through to the Kickstarter project to see it in action.