Eiko #44 bulbs are used for GI, and occasionally lamp matrix applications, on the playfield.
We also stock #47 bulbs. These are the same size and voltage as a #44, but use less power. The #47 is a good option for GI bulbs in a heavily-loaded machine, as the lower load will prevent connector burn
We prefer the brightness of #44 bulbs, but #47 is a good option if the machine is on a lot of the time.