Really... glass fibre/resin PCB with etched copper tracks, alloy solder, driver semiconductors made from rare earth minerals, some very very toxic,capacitors made from other materials, never mind the manufacture of the LED itself, hint , few furnace operations involved, ,acrylic lenses and plastic housing. Bit like sausages , like the result , wouldn`t want to see how they are made. Then end of life recycling... http://www.it-green.co.uk/images/burning_e-waste.jpg At least don`t have trace of mercury that landfills full of lighting`s last revolution, compact fluorescents, had in them. It`s an economic argument to keep the lighting industry fed on it`s constant diet of replenishment, like electric cars requires creating a complete disconnection between total energy cost including manufacture and disposal and energy use in service lifetime.