In our Qabrustaan people put even artificial flowers, small solar lights and even teddy bears on the graves.

Answer

It is not permissible to adorn graves with flowers whether real or artificial. Artificial flowers are worse. Adorning graves with solar lights is worse and a greater sin than the sin of flowers on graves. Placing teddy bears is worse than even the solar lights. Images of animate objects are haraam at all times. These practices are totally haraam. All these objects should be removed from the graves.