Light Bulbs! Why can't I identify them?

Thank you all for your responses! They have helped a great deal. I worked in the coach all day yesterday and came up with a couple more burnt out bulbs, the "wedge" type. They are in the sconces and bedroom reading lamps. So I ended going to superbrightleds.com and ordering a handful to test. If they are to my liking I will slowly replace the halogens with LED's. They are expensive, but provide the same or more light for a fraction of the electricity so help with battery life. Almost as important to me is the heat the incandescent and halogen lights put out. That will save on the AC.
I just wanted to thank everyone who responded for the very kind assistance. If anyone is interested I'll post how these lights work out for me.
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