A large animated Neon Sign for tops of buildings or being attached to the walls of these. Has animation, normal mapping, simplified constant night mode. Why constant nightmode? Check its daymode, compare it to other daymodes in TS12 and you will see the difference.
Can be converted to TS09 and TS10 (and will work there) by changing the version number in the config.txt from version 2.9 onwards.