1.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.

3-5 years from the production date.

2.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.

3.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.

4.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.

5.What’s efficacy about the light ?

RE: The light output of a light source divided by the total electrical power input to that source, expressed in lumens per watt(lm/w).

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!