LEDs Solutions for Sports Lighting
This paper discusses how spectral tuning and LED source size can be used across all sports lighting applications.
In years past, the retrofit lamp industry witnessed the revolution of indoor lighting migrating from low CRI bulbs to now 90 CRI bulbs due to advancements in die and phosphor efficiency as well as color rendering technology. The sports lighting industry is experiencing a similar phenomenon; however, sports lighting have an added complexity where high end sports lighting not only serve a human audience , but also a silicon detector; hence, requiring TLCI values greater than 90, in addition to fulfilling CCT/CRI specifications on lighting. The high TLCI values can be achieve by intelligently color tuning with phosphors.
This paper shall explain the vast field of sports lighting requirements from the lights at a primary school’s gymnasium to the local neighborhood sports field to professional stadiums where championship games such as the Super Bowl and World Cup are held and televised. The added dimension of televising places a requirement on TLCI. We shall analyze the differing color perceptions when broadcasting cameras film under low or high TLCI lighting.
In addition, we shall examine the new sports lighting specifications from China as well as review the IES recommendations on sports lighting and how NEMA beam types are used to achieve the appropriate light distribution.
As the optical radiation pattern for sports lighting tend to be narrow, the optical source size of the LED will impact the size of the lens and consequently the size of the fixture. An example will be given on how a big LED is at a disadvantage to a smaller LED with high brightness.
• Lessons Learned (3-5 bullet points with max. 10 words per bullet point)
– Sports and arena lighting requirements across the world
– Relevance of LED spectrum to the TLCI Index
– Relevance of LED optical source size to the integral solution