My trunk lights were festoon till I switched them out for LED's as I did for a bunch of others - did you search the forums - oh yeah - worst search engine on the planet.
JUst remembered - the "oem" bulbs are listed somewhere - I am sure - and when you go here:
http://autolumination.com/ they will give you the same bulbs in LED's
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2006 M COUPE - 380 total production, 1 of 40
Imola Red produced for NA , ESS 455 Supercharger, Speedhut Gauges, VPM CLS wheels, 19" Hancooks, Stromung Exhaust, Carbon fibre accessories and black and white badging,