  The amperage is on the label of the ballast. When you connect the ballast to power you will see it along with the voltage and pf of the ballast. F40T12 twin 8 foot tubes, ballast usually draws about .75 amps. The amperage is on the label of the ballast. When you connect the ballast to power you will see it along with the voltage and pf of the ballast. F40T12 twin 8 foot tubes, ballast usually draws about .75 amps.
A Single Din is the standard size of a head unit (the stereo in the dash of your car) a double din is twice as large. Double dins are good for cars that have large stock head units like a caddyhas.
Deutsches Institut fÃ¼r Normung - DIN standard designation. 1  The designation of a DIN standard shows its origin (# denotes a number)... 2  DIN # is used for German standards with primarily domestic significance or designed as a first step toward international status. 3  DIN EN # is used for the German edition of European standards.