<p>[Update: Photojojo told us that Luxi "talks" to the iPhone via the front-facing camera.]</p><p>For casual photographers looking to add more precision and professionalism to their shots, say hello to the little Luxi from Photojojo.</p><p>Luxi is a portable spot-on light meter that easily attaches to your iPhone, meant to be used with a DSLR or any camera that has a manual mode. With a quick slip-on of its diffusing 180-degree dome, Luxi is able to measure the light falling onto your subject and give accurate readings to ensure the most vivid exposure possible. Luxi communicates with the iPhone through the front facing camera, relaying the lighting information to the companion Luxi app.</p><p>Unfortunately, if you have a case on your iPhone, you'll have to remove it first before attaching the Luxi, and it works only with iPhone 5 and 5S.</p><p><a href="http://www.digitaltrends.com/photography/photojojo-luxi-light-meter-helps-find-optimal-lighting/">Keep reading...</a></p>