4 in. x 4 in. 3 Lumens Copper Plated Plastic Solar Post Cap (Common: 4 in. x 4 in. ; Actual: 3-5/8 in. x 3-5/8 in. )

Absolutely! We live south of Buffalo, NY, and ours have held up beautifully for years. We just actually purchased additional ones to place around the pool.

Not that I know , maybe on line

Go to veranda barrette's website, they are the manufacturer as stated above, and their contact info will be there although the instructions tell you to contact home depots customer service for warranty and other issues so maybe start there.

By turning dark im assuming you mean the copper finish wearing off and revealing the dark plastic it was painted on? You could try automotive clear coat but the copper wont be as shiny but if you have harsh weather then losing some shine might be worth it to last longer. You can also use Rustoleum copper spray paint for touch ups or something similar. Ultimately these are just painted plastic so depending on how harsh your weather is they only last a year or 2.

Push down and turnj

It comes with a rechargeable battery that is charged by the solar panel. Depending on the sunlight I get anywhere from 2-12 hours on a charge.

Easy to install and looks really nice. Just bright enough to be seen but not overwhelming.

Yes those were the only two colors

I just use a dam rag then dry. Still look brand new.

are batterys used in this deck light?