magnetic ballast t12 bulbs

Discussion in 'The Projects Forum' started by Steve R in FL, Feb 10, 2015.

  1. Steve R in FL

    Thread Starter New Member

    Jan 9, 2015
    I have a magnetic ballast which will run 2 40w t12 48" bulbs. The wiring diagram suggests that if I only use only the red leads, it can be used to run a single 40W bulb. Does anyone know If I can use it to run 2 20w 24" bulbs in this way in series? In other words, is a single 48" 40w bulb equivalent to 2 24" 20w bulbs in series?