This led diode lamp is very simple to make, it is made up of 2 main pieces. I used 32 diodes, but you can use more or less according to the light you want to get.Initially I glued the diodes at the same distance with hot glue and then I welded them in parallel. To power the lamp you can connect a simple USB socket or use batteries. I used the cr2032 but they have a very short life. In the .zip folder you will find the images of how I did it.