UK-based clean tech firm Zeta Controls has developed an aluminium cage fitted with small LEDs that are positioned to diffuse light in the same way as a 60W incandescent bulb while using just 9W of energy. Anthony McClellan, commercial director at Zeta Controls, introduced that, "The aluminium cage structure allows air to flow through the bulb, cooling it without the need for a heat sink. That means you can create a bulb that is the same shape as standard bulbs. One of the main obstacles to deployment of LED bulbs has been they have tended to be different shapes an...