I think when one light is the car is first in class, 2 for second, etc. They are easier to see on light colored cars. They don't show up very well on dark painted cars. p Original Message ----- From: Michael Wells<mailto:mcwellsphoto@xxxxxxxxx> To: ratpack@xxxxxxxxxxxxx<mailto:ratpack@xxxxxxxxxxxxx> Sent: Monday, July 19, 2010 3:36 PM Subject: [ratpack] Re: I was just wondering... Thanks for the info, go figure. Dr Z On Mon, Jul 19, 2010 at 3:10 PM, Ray Buck <rbuck@xxxxxxxxxxxx<mailto:rbuck@xxxxxxxxxxxx>> wrote: They're on the LMPrototypes (not LMPC) and GT (not on GT3 or GT Challenge)cars and show the car's position in the running order in their class. I bleeve the ACO mandated them for identifying the cars at night at Le Mans. r Sent from my Dreadnought using that barely tolerable Thunderbird email program On 7/19/2010 3:02 PM, Michael Wells wrote: I've noticed on many of the GT cars in the ALMS series that they have three small lights, generally right behind the doors. Can any one tell me what these small ights are for? Dr Z -- Dr. Z aka Michael Wells MCWells Photography mcwellsphoto@xxxxxxxxx<mailto:mcwellsphoto@xxxxxxxxx> 801-850-7279 -- Dr. Z aka Michael Wells MCWells Photography mcwellsphoto@xxxxxxxxx<mailto:mcwellsphoto@xxxxxxxxx> 801-850-7279