I'd vote sunlight on WOZ as well.
Many on that page say: 555 (fits 906) base. Just so you know, a 555 base (which is wedge) is smaller than a 906 base (which is also a wedge, but slightly larger). A 555 bulb will fit in the (slightly larger) 906 base. A 906 bulb will not fit in the (slightly smaller) 555 base.
Also, since it can be confusing...generally speaking, anything marketed as a "flasher" for a pinball machine means it's 12v or 13v. Traditionally GI and inserts were 6.3v and flashers were 12/13v. Things are now a little more confusing since JJP uses 12v for the GI.