Heath Zenith HZ-4150-PB-B Motion-Activated Four-Sided Charleston Coach Light, Polished Brass with Clear Glass by Heath/Zenith. $33.10. Amazon.com                A motion-activated porch light sounds like a good idea, but the awkward and bulky appearance of most motion-sensing arrays have made this an uninviting option for most homeowners. However, Heath Zenith&#x27;s coach-style lantern allows you to take advantage of the convenience and energy efficiency of a motion-...