there are two or three "silver star" versions of the bulb
I got the one just above the standard lamp
there are tradeoffs, you would have to get the specs for each one and compare them
but the short version is: the more expensive ones also have a shorter life expectancy. They make the bulb brighter by making the filament hotter, therefor it does not last as long.
Also make sure what you get is not much higher in wattage: if your stock light is 55W I would not go over 65W.