LED lighting is directional compared to HID, (MH) Metal Halide, (HPS) High Pressure Sodium, and Fluorescent lighting which require reflectors to direct the light. Even with a quality reflector there are light losses and as they age and collect dirt the losses are greater.
HID bulbs illuminate in 360 degrees, in contrast LEDs are directional lighting, illuminating a maximum of 180 degrees through their primary lens.
LEDs Need to Focus
High power LEDs are constantly improving and an increasing number of options are available for a wide range of applications. Such as street lighting, parking lot lighting, event lighting, architectural lighting and spot lighting. The LED emitter and primary optic on their own cannot deliver enough intensity to the target surface.
Secondary optics produce a controlled beam with light rays that are parallel that will bring the full intensity of the LED to the area you need.
Different optics can change light direction much differently Concentration or dispersion, wide or narrow.
For example, our street lights have 5 different optics to different road width, poles distance and parking lot area.
