Model: AB-T 3U Preheat start, Polarity protection, Low heat ,Low cost Rated Voltage:12V DC 24V DC Watt: 15W 20W 23W 25W Lifetime:8000 hours Lamp Base:E27,E14,B22,E26 • Preheating, high electronic efficiency.Polarity Protection • Saves up to 80 % of energy compared to an incandescent bulb • Extremely high number of switching cycles • Easy to install by E27/Edison Socket or bayonet socket (B22) • Low temperature and low voltage start • Extremely high illumination efficiency • Compact & robust product design