The 10 LEDs are arranged inside the standard MR16 reflector unit. These bulbs actually give a more even spread of light than most halogens with no "hot spots" when used to light shelves, paintings or over tables. Light output is similar to a 15 watt halogen. These bulbs look no different to a regular MR16 halogen bulb. These high quality SMD LED replacement bulbs save power. Energy efficient, they last up to 50 times longer than a standard bulb. The latest SMD chip technology is used that provides the highest light output to consumption ratio available today.