Peak Led Miniature bulbs feature 30,000 hours rated life low power consumption and high brightness. They are a direct replacement for standard incandescent lamps and feature a consistent lumen output. Use of this white LED behind amber and/or clear color lens (where appliable) will increase visibility with out sacrificing bulb performance High output lumens in comparison to traditional glass bulb Guaranteed fit, form, function (check application guide), with no polarity this bulb fits in vehicle socket like a traditional glass bulb. fits - 3157, 3057, 3047 Always replace in pairs for best performance and greater visibility