I had a set of older MTH UP E-3's that came without interior lights. A traditional light bulb couldn't be used because the front motor is mounted too close to the front of the cab. I improvised and took a single piece of LED strip lighting 3 lights per 2 inch piece and put it in the top of the cab. There was still one problem though with a white light the motor showed way too much so I tinted the LED strip with Tamyra clear green paint. I would like to get opinions on how this looks good or bad before I decide to do anymore that I have without interior lighting.