A friend of mine just got me some bubble lights while he was in connecticut and i noticed something diffrent abut these bulbs. They are the noma biscuit style but the lamp base has a westinghouse W on the threads (two seprate lights have the W) and i thought that after the initial run of lights produced by Matchless that G.E. produced the flat top bulbs for Nomas bubble lites. I think i got a great deal because he got five bubble lites (3 blue tubes, 2 purple) for $30.00. They all have the glass slugs in the baseand all light and have very little if any warping.