Ra>90 IK10 965 The colour rendering index Ra is the measure of the correspondence of the perceived light colour between an existing lighting situation and a reference light source.The smaller the deviation, the better the colour rendition. A light source with Ra 100 reproduces all colours exactly. The lower the Ra value, the less precisely the colours are reproduced. COLOUR RENDERING INDEX RA RA 90-100 very good colour rendition RA 80-90 good colour rendition RA 70-80 medium colour rendition Standard values: Incandescent bulb, halogen lamps up to Ra 100 LED lamps Ra 75-95 Compact fluorescent and energy-saving lamps Ra 80-89 Fluorescent lamps Ra 70-85 In addition to the IP protection class, you should also keep an eye on the IK value of a luminaire, which is increasingly required within the scope of tenders and for installations in public spaces. The IK value [or IK impact resistance level] indicates how impact-resistant a luminaire or certain components are. IK00 offers no protection against external mechanical stress, IK10 or IK10+ means that the luminaire can withstand a 5 or 10 kg test weight from a distance of 40 or 50 cm. Code impact energy in joules corresponds to drop height in mass IK00 no protection IK01 0,14 7 cm - 200 g IK02 0,20 8 cm - 250 g IK03 0,35 14 cm - 250 g IK04 0,50 20 cm - 250 g IK05 0,70 28 cm - 250 g IK06 1,0 40 cm - 250 g IK07 2,0 40 cm - 500 g IK08 5,0 25 cm - 2000 g IK09 10,0 20 cm - 5000 g IK10 20,0 40 cm - 5000 g IK10+ 50,0 50 cm - 10000 g There are eleven codes, corresponding to the impact energy that a enclosure can withstand. [source: wikipedia.org] IK VALUE
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