F-500B Magnifying Lamp 1.) Desk-top type,with 22W fluorescent lamp 2.) Active arm is adjustable and convenient A) SummarizeMagnifier ... 500AB).These magnifier matches 12W cirle fluorescent lamp(type D). 14W(2x7w) U shape fluorescent lamp ( Type F,G,H,I), ... -up start. After you turn on the power, the lamp will warm up around 1.5 second and the ... up until the power is turned off. F-500B Magnifying Lamp