Aazon.co: Satco S7211 9-Watt ediu Base T2 ini Spiral, 2700K, 120V... 2700K soft white bulb , Energy Star rated Fluorescent lamps are phosphorous-coated tubes filled with a low-pressure mercury vapor. Related Products Reviews Additional Information Brochures & Specific Sheets S7211.pdf ... Satco S7211-TF - 120V - 9W - T2 Mini Spiral Compact Fluorescent - Medium Base - 550 Lumens - 2700K Warm White - 82 CRI - Shatter Proof Satco S6717-TF - 13 Watt - Pin-Based Compact Fluorescent - White - GX23-2 Base - 780 Lumens - 2700K Warm White - Shatter... This causes the mercury vapor to generate a radiant energy., 12000 Average rated hours , 9-Watt medium base Satco S7211 9W T2 Ultra Mini Spiral Light Bulb Screw-in 2700K Fluorescent Bulb Satco Products S7211 9-watt Medium Base T2 Mini Spiral Bulb Satco Products S7212 9-Watt Medium Base T2 Mini Spiral Satco S7211 2700K Soft White 40W Equivalent Medium Base