There is some waste heat caused by inefficiencies within the LED, however, the net result is a big gain in the percentage of electricity converted to visible light.
The problem for Iranians came to light late last week as hundreds of players in the country posted messages to Blizzard's European Battle.net forums complaining they could no longer access the game.
He had opened the scoring at the Stadium of Light with a bizarre goal, when Anton Ferdinand's attempted clearance bounced off the Spaniard and looped into the net.