PL-S 4 Pin is a energy-saving compact fluorescent lamp with very low mercury content consisting of 4 parallel narrow fluorescent tubes., Product characteristics, , Energy efficiency: very good or good (EEC = A or B), Luminous efficiency: very good (50 until 82 lumens/watt), Average life: 13,000 hours, corresponding to around 13 years at about 2.7 hours per day, Colour rendering: good (Ra = 82), Single-ended plug-in base, Mercury content: very low (1,4 mg per lamp), Recycling: very good (> 99 %), Manufacturing plants are certified according to theISO 14,001 international standard for environmental management