... convenient. A) SummarizeMagnifier series are F-500A,F-500B,F-500C,F-500E,F-500F,F-500G,F-500H,F-500I (including green glass and ... last serial number of white glass such as F-500AB).These magnifier matches 12W cirle fluorescent lamp( ... D). 14W(2x7w) U shape fluorescent lamp ( Type F,G,H,I), 22w(A,B,C,E). Its ... 0.933.Current flowing: THD< 40%4. Warm-up time: tp≤1.5 second5. Lumen: Lm≥0.956. Protector: can ...