Beam Lens impact on LED Luminaires Photometric Parameters for Exterior Lighting

LEDs package with beam lenses implemented, for industry, outdoor and street lighting applications. In order to evaluate the photometric performances of the led lighting, a recent LED source with luminous efficacy up to $163 \mathrm{~lm} / \mathrm{W}$ and long lifetime (about 100000 h) is experimentally analyzed with four part of multi-lens. The package included two module of LED with an on-mode power about $23,90 \mathrm{~W}$ per module are evaluated how much the presence and type of lenses used in the LED packages construction influence the quality and the geometry of the light produced. A different part of lenses with some efficiency up to 94 percent are tested for that module by a special driver on which allows setting the output current by LED-set function. The experimental results shows that it changes remarkable CRI, CCT and flux as compared as possible with LED-set current source applied.