I believe it is a 4.5V. It is just the little diode type of LED light. it is for indoor use.
Ok. So a typical LED in that type of application uses about 0.5 watts, which means at 4.5V, it is pulling about 0.11 amps.To run it for 1500 hours, you will need a battery capable of 1500 x 0.11 = 165AH (Amp Hours).That is about three car batteries, which are big. Car batts are also 12V so you would need some way of stepping down the voltage.Have you thought about that?I'll be here if you need further help with this issue. Please let me know.RegardsSteve
How do I step down the voltage?