How many times have you driven around a strange neighborhood at night, looking in vain for a house or apartment with no visible numbers? Wouldn’t it be great if all house numbers lit up like Christmas trees? These Solar LED Numbers from Matterinc use the sun’s energy to power two high-output white LED’s that illuminate for up to 10 hours. The numbers are cut out of aluminum plates that come in 6 1/8” x 3 ˝” sizes. The LED's light up the cutouts from behind, giving the illusion that the numbers themselves are glowing. A pretty nifty effect, really, and one that will surely grab the attention of any due-to-arrive guests, not to mention emergency service people. Each number costs about $18, which is pretty cheap, even for those with a four-digit address.