A lamp from concrete easily can be made by yourself with quite simple tools and materials. First you will need a wooden board which is 14cm wide and 80cm long. From this board you need to saw five pieces with following dimensions: 4 pieces 14x16cm, 1 piece 14x14cm. Therefore you can use any electric saw or a hand saw. After you have sawed out all the pieces drill the holes at each position where you will set screws. Do not forget to drill a hole for the wire on any sidewise pieces. Now screw all the wooden pieces together to a box. All the inner joints of the assembled box have to be sealed with silicone so that water cannot escape. Head over to instructables.com to keep reading the tutorial.