Yes, though they are getting better and am sure if shielded from strong sunlight will give acceptable service (under a tinted S fairing say?!?).
I once pulled apart the speedo/tach unit on a rice cooker I had to stick a cheap digital watch face in there to give me a clock, reasoning that a year or so till I needed to change the battery was worth going to the trouble of the dis-assembly. It lasted only a few days till the display blanked out, and on only the coldest of mornings would give a meagre display till it hit sunlight or warmed up. Seems to permanently affect the display.
Bill...................;-)
