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Making solar powered garden led light with use of a solar panel? Answered

I have a pergola at my main entrance and I want to hook up solar lighting to light up the path. I was thinking to get 6 solar garden lights and take them apart and place the solar cell on the top of each pillar, run the wires down the outside of the post and drill the post laterally and bring the wires in from behind to the actual pathway. From there hook up the LED light that was originally IN the garden light. My question is...Is there any way I can get just ONE solar panel and operate all six LEDs off of that one panel? I am assuming I can go with one panel, solder a photocell (12v) inline and lead it to a battery holder of eight AA batteries. From there it goes to an Automotive grade 12v dome light, similar to a Festoon Bulb. These come in various colors. My only question is....What wattage should I get the solar panel? Could I get the solar panel with a built in photocell similar to what garden lights operate with?


Don't automotive grade 12v LED bulbs have an internal resistor? Logically they must because there aren't resistors anywhere else in the system on a car. When I upgraded my tail lights on my classic car from incandescent, I bought a few super white LED PCBs and attached them into the circuitry with the proper 1156/1157 bayonet socket. Some are High Lux (tail lights)...some are Hi Lux/Low Lux (tail light/brake light)

Yes, that is correct, automotive LED bulbs do have an internal resistor.
Please disregard my previous post.


7 years ago

The wattage that you require and the power that you generate is going to vary with the seasons.
First determine what your total demand is going to be for the longest night. How many watts your total demand is times the hours will tell you how big your storage needs are. This is providing that you plan on the lights being on all night.
Once you determine your demand then you can figure how large a capacity your battery needs to be and you need to have a cushion because you don't want the battery going totally flat. Finally after you know that, you can multiply the output of a Solar panel times the shortest day, which will be the least amount of usable light you have. This will tell you what size panel you will need. This is all assuming that you want the lights to be on all the time and totally powered by the solar panel.