50W Sylvania HSL BW Standard Mercury MBF U50 Watt 4000K CCT29,000 hours lifeUniversal burning positionE27 ES cap, 1,800 lumens
50W GE Kolorlux MBF U Standard Mercury MBF-U50 Watt 4000K CCT16,000 hours lifeUniversal burning positionE27 ES cap, 1,800 lumens