I'm going LEDs on my turn signals. There were some neat ones on Ebay (under motorcycle tail lights) with aluminum housings and various shapes, but I am going with some inexpensive 2 inch round ones that were advertised the same place. I'm going to fabricate housing out of wood, the rear turn signals combined with a tail light housing that will include a license plate holder and a 1960s Triumph tail light. LEDs make sense here in the tropics and wood does as well, because I can suit myself whether to make it look like wood or give it a flat black metal look. The wood will be epoxy coated before being painted or varnished.
LotusMan mentioned having sticky LEDs due to their low resistance, maybe, and thus incompatibility with flasher relay switch (not to be confused with flashers, the unit being the module that makes turn signals flash). Another place on Ebay sells a flasher relay switches called "Blinker Winker Flasher relay switch" claimed to be compatible with both incandescents and LEDs. I ordered one of those. The total outlay for my new turn signals, plus the Triumph tail light and the relay switch came to about $50 plus a god-awful amount of postage. The wooden parts will be from leftover scraps I always have available. I know it sounds Mickey-Mouse, but wait and see.
I'm not overly impressed with the lighting fixtures I've seen on bikes as many seem tinny and out of place. They mostly seem like an afterthought. The one on my bike is a rusted piece of crap which is tolerated until something better is produced. With modern materials like carbon fiber, and given the volume possible, it is an area I might have explored with a view toward manufacture, were I still in the U.S.