I have a lighted waterfall picture with sound that only worked for about 2-3 months. I have sound but no light leading me to believe the bulb is burnt.The only markings on the bulb is 32RR and 6400K and then some chinese writing.It has a 4-pin configuration. How do I measure the diameter ( more . . .

Nothing really complicated, where do I start? How costly would it be? Shade or sun? I appreciate your responses. Keywords – waterfall Lighting more . . .