Solar Self-Recharge 60-LED Tree Light (Green LEDs)

Pros: Just switch them on and throw them at your favourite tree, and they will lit automatically when it gets dark enough. No need to plug them into an outlet or change batteries.

Cons: Not mega robust build quality, so don't try to smash it down to a frozen ground when holding onto the unit it self (like I did. I broke some of the plastic, but it still works great!:).

Instead, take it of the pole and insert the pole into the ground, and then place the unit on top of the pole. Works much better;)

Other: Buy this, and also get the red one, and put them together to make beautiful christmas theme lights on your trees!

Pros: Lovely green glow after dark, brighter than I expected. They stay on all night, although it's summer here at the moment, so they get many hours of daylight. Couldn't be simpler to use, switch on, expose solar panel to daylight and enjoy the spectacle at night.

Cons: None so far.

Other: Buy them, they're great!!

Pros: No need for an outlet, so I can leave it outside and go on a vacation without worrying about a fire or my energy bill coming too expensive.
LEDs are bright without lighting the place too much.
Turns on by itself when it gets dark enough.

Cons: Only one battery inside. I added up one more so they last longer (although I don't need this here as I have about 15 hours of daylight this time of year).
1.2V NiMH rechargeable batteries will do the job.

Other: Very good product! I'm sure you won't regret it if you buy it!