Hello! So I have this Kodaslide Merit slide projector--but the bulb is dead. I know from reading the engraving on the bottom that it can take 100-250V, 150W bulbs (tungsten, I believe). When I went off to buy a bulb I found out that there are many kinds of bulbs and codes, there being no code on the light bulb itself, I have no idea how to continue. Any help, please?