1.What’s the meaning of “Beam Angle “?
RE: The spread of light from a luminaire. For example: a fitting such as a low bay ,which is closer to the floor,will have a wider beam angle to illuminate a given floor area while a high bay fitting will have a narrower beam.
2.How do we explain “CRI” ?
RE: A measure of the degree of colour shift objects undergo when illuminated by the light source as compared with those same objects when illuminated by a reference source of comparable colour temperature. The reference source has a CRI of 100.
3.What’s CCT(colour temperature) ?
RE: The description used to describe the effect of heating an object until it grows incandescently. The emitted radiation, and apparent colour, changes proportional to the temperature; easily envisioned radiation, and apparent colour, changes proportional to the temperature; easily envisioned ,when considering hot meal in a forge that glows red, then orange, and then white as the temperature increases.
4.Do you know “dali “?
RE: Digital addressable lighting interface (DALI) is a trademark for network-based systems that control lighting in building automation.
5.What’s the fire rating categories ?
RE: VO-Burning stops within 10 seconds on vertical specimen; drips of particles allowed as long as they are not inflamed.
HB-Slow burning on a horizonal specimen’s burning rate <76mm /min thickness <3mm or burning stops before 100mm.
TP(b)-Slow burning rate <50mm / min for thickness <3mm.
TP(a)-Self extinguishes and flaming and afterglow should not exceed 5 seconds once source the source of flame is removed.
6.How to explain “Flux/luminous Flux “?
RE: Luminous flux is the measure of the perceived power of light produced by the LED, adjusting to reflect the varying sensitivity of the human eye to different wavelengths of light.
7.Why we use the high power LED ?
RE: A high power LED, sometimes referred to as a power LED, is one that is driven at current of 350mA or higher.
8.How to explain “illuminance“?
RE: The intensity of light falling on a surface area. If the area is measured in square feet, the unit of illuminance is footcandles(fc). If measured in square metres, the unit of illuminance is Lux.
Thank you for your using Dualrays LED luminaires, we regards quality first as our marketing philosophy from the design and package of all our
products,we here declare that all of our products are tested by professionals and obey strict quality standards,we have professional after-sale
service team to follow our customers,we promise that when you find any quality problems caused by the products quality itself within its
guarantee period,you can contact us freely. When confirmed by the QC Department, we will immediately help you to exchange or
maintain products for free.Shenzhen Dualrays Optoelectronics Co., LIMITED. will serve you with heart and soul!
