(Photos by Ulla Taipale)
LED attached to copper tape (photo by Kati Hyyppä)
LED diagram (photo by Kati Hyyppä)
Explaining how the LED system works... (photo by Kati Hyyppä)
Shining LEDs (photo by Kati Hyyppä)
Attaching the copper tape (photo by Kati Hyyppä)
(photo by Kati Hyyppä)
(Photo by Andrew Gryf Paterson)
(Photo by Antti Ahonen)