We provide 2-3years warranty to all of our products.

Customer satisfaction is important to all of us at Hansen industry development  Co.,ltd.. We will ship your merchandise as quickly as possible. For normal products, if your order has not yet been shipped, we can cancel it for you. However, we shall not be able to process a cancellation once your order has been shipped. For OEM / ODM products, sorry we cannot cancel it once we start makes it.

All products are carefully wrapped with utmost care to ensure a safe delivery to its destination. In case of damage during shipment, please file your damage claims to the delivering carrier immediately, and notify us within 72 hours after your receipt of the damaged merchandise.

Please confirm your address before ordering! Your product will probably not get to its destination in time for the important occasion if you supply an incorrect address when ordering. Make sure that your address includes apartment or suite numbers if applicable. and the most important thing is to give us your phone nubmer If a package is returned to us because of an address problem, we will reship the package to you or a corrected recipient address. You will be charged the additional shipping fees.

Although we offer Express and registered postings, we would suggest delivery by Fedex,UPS or DHL In an effort to further your shopping experience with us, FIRST has decided to protect customers on any loss of packages sent to you via DHL,TNT or UPS or Registered Post. For registered postings, simply wait 3 months, so we can determine and confirm that the package has been lost, and we will reimburse you a full store credit up to the value of the product that you chose. For UPS deliveries, it may take 1 month to claim for rebursements. We remain as always 100% dedicated to customer service.

In case of quality discrepancy, claim should be filed by the Buyers within 10 days after the arrival of the goods at port of destination. For quantity discrepancy, claim should be filed by the Buyers within 5 days after the arrival of the goods at port of destination. If the package is broken please take the picture and we will take with the express company.

If the indent is given and for one full container load, the proper time for shipment of regular types of we trooper products is usually 10-20 days after receipt of L/C or T/T down payment. Transit Time: Transportation Mode Destination Transit Time By sea(from China Main Ports) Hongkong / Japan / Korea3 daysEuropean Main Ports25~30 days Black Sea Countries30~35 days Middle East15~20 days American West Ports12~14 days by express vessel;28~30 days by common vessel American East Ports40~45 days Oceania Countries15~20 days By Railway or Multi-model Transportation Countries along the Eurasia Continental Railway Line35 days to Moscow Note: Shipment schedule may be delayed during the MAIN holidays in China, i.e.: Spring Festival holiday: usually in January/February Labor Day Holiday: May 1st to 3rdNational Day holiday: Oct. 1st to 7th.

We prefer confirmed 100% irrevocable letter of credit payable at sight; Possibly T/T 30-50% of total amount as down payment before shipment and left balance before releasing documents; All by T/T before shipment, especially for the case that the total deal amount is small. some other payments are also welcome if the amount is very small, such as Paypal, Western Union, etc.

Samples are available. Normally we take 3-7 days to make a sample. If we have no business record with you before, we need to charge boot samples cost and post courier freight.

Hongkong Post Air Mail with Tracking Number (Under 1 KG) $9.0 for All over the world Worldwide Express (UPS,DHL): Starting at $25. Please give us your phone number, because this information is required during the express delivery.

Minimum order quantity depends on a particular product - usually 10pcs. In case of orders for a smaller quantity we charge additional fees. At the meantime, we also have several warehouses, each kind of regular products has 10 sets in stock. if you need a small quantity like several pieces for a try, it is also available for us to deliver you.

A price offer is based on customer's particular order, agreed payment terms, and actual cost. Usually, the offer is valid for 15 days.

We have CE,  BIS, TIS, TUV, RoHS,UL, ETL&SAA., SASO,  It's based on the product,each product has its own certification.

We have a factory for LED encapsulation and purchase LED chips for processing, which ensures the quality of the products and makes them competitive in price. And we have exported our products to over 90 countries worldwide. Even more, we can offer first-rank service to customers.

Energy efficiency of light sources is typically measured in lumens per watt (lm/W), meaning the amount of light produced for each watt of electricity consumed by the light source. This is known as luminous.

Luminous Flux is a quantitative expression of the brilliance of a source of visible light, which is electromagnetic energy within the wavelength range of approximately 390 nanometer s (nm) to 770 nm. This quantity is measured in terms of the power emitted per unit solid angle from an isotropic radiator, a theoretical point source that radiates equally in all directions in three-dimensional space. The standard unit of luminous flux is the lumen (lm). Luminous intensity is an expression of the amount of light power emanating from a point source within a solid angle of one steradian. the candela was defined and adopted as the standard unit of luminous intensity. One candela (1 cd) is the magnitude of an electromagnetic field ( EM-field ), in a specified direction, that has a power level equivalent to a visible-light field of 1/683 watt (1.46 x 10 -3 W) per steradian at 540 THz. Luminance is the luminous intensity, projected on a given area and direction. Luminance is an objectively measurable attribute. The unit is 'Candela per Square Meter' (cd/m2). So, different monitors can be adjusted to the same luminous intensity by measuring the luminance in cd/m2. llluminance is the total luminous flux incident on a surface, per unit area. It is a measure of the intensity of the incident light, wavelength-weighted by the luminosity function to correlate with human brightness perception. Light EffectLight Effect is the rate of the electronic power turning into the light power, It is unit as "lm/W". Color temperature is a simplified way to characterize the spectral properties of a light source. While in reality the color of light is determined by how much each point on the spectral curve contributes to its output, the result can still be summarized on a linear scale. Standard unit for color temperature is Kelvin (K). Color rendering: Effect of an illuminant on the color appearance of objects by conscious or subconscious comparison with their color appearance under a reference illuminant Standard unit for color temperature is Ra.

The Color Correlated Temperature (CCT) is given in the description of each of our white led light.Warm white is 3000k. Daylight white is 4000K and a cool white is 6000K or more.

One reason is that different semiconductor materials are used for different color LEDs, and some semiconductor materials are more expensive than others; another reason is that manufacturing costs are different. White LEDs are the most expensive because red, green and blue LEDs are combined together to make a white LED.

LED's are extremely reliable by the nature of their design and the way they are constructed. Individual LED's have very high life expectancy with very low failure rates. Light Source Rated Life (hours)*Incandescent750 to 2,000 Halogen incandescent 3,000 to 4,000 Compact fluorescent (CFL)8,000 to 10,000 Metal halide7, 500 to 20,000Linear fluorescent15,000 to 20,000High power white LED35,000 to 50,000.

The panel light uses SMD2835.The downlight and track light always use CREE COB.The wall pack use 3030SMD. The led flexible strip usually uses SMD 3528& 5050 LED, and only the SMD5050 led can do RGB Colorful changes. The LED Tube usually used SMD3014 LED, and SMD3528 & SMD5050 are also used for led tube.

The LED wall pack main market is USA, voltage is 110V, LED panel light and LED ceiling light is 100-240V, The LED Flexible working voltage is DC 5V, LED Module uses DC5V or DC12V/24V.

We accept the buyer's request of inspection by third parties, such as SGS, B.V., COTECNA, etc. but the total charges related shall be on buyer's account or Shared.

Yes, this is our regular cooperation and business. We accept producing products under Clients' brands.

LED floodlight and housing set, LED Panel light,  LED streetlight, LED downlight, LED waterproof led light, LED wall washer, LED tube, LED highbay  light and some relative solar power products.