It is all in the design when it comes to replacing the normal incandescent with LED's. Even though LED lights are small as individuals, they shine brightly and work very efficiently. LED's come in "bulbs" which have the same compatible base as an incandescent bulb. When they replace them, they go up, take off the colored panel, pull the old incandescent light bulb out and replace it with the array of LEDs. The new street lights will last for years and save money by lower maintenance