2 of the 25 watt fluorescent prismatic bulbs with 160 watt self ballasted mercury vapor bulb

2 of the 25 watt fluorescent prismatic bulbs with 160 watt self ballasted mercury vapor bulb

The white based Osram prismatic bulb and the black based Philips prismatic bulb connected with the 160 watt self ballast mercury bulb which was absolutely amazing and I was think the self ballast mercury vapor bulb always goes in the middle as the other light bulbs go on each sides.