News

Knowledge for Food Fresh LED Light

Food LED Lighting One of the senses we have at our disposal, sight is what we predominantly use to perceive quality and freshness. In today’s market, the anchor for supermarket chains, and independent green grocers alike, is the freshness of their produce. This is why it is crucial to do food lighting displays justice and illuminate them in light with characteristics that are best suited their colouration. Tuned and Accurate Colour temperature Opte’s Meat LED is white color LED, not that red LED mix white LED like normal light. Luring clients Within 1 step MacAdam Color Ellipse, Opte’s Meat LED is developed with a tuned and full color spectrum that enhances red and simultaneously displays white in a clear and fresh way.Deliver a spectacular visual fresh impact for appearance of meat, look incredibly attractive. Colour Rendering Index (CRI) Opte can offer high CRI 97 LED. The colour rendering index of a light source is a measure of the sources ability to reveal an objects colour faithfully. Powerstar luminaire render the vivid reds of fresh meats and the oranges and yellows of dairy products like cheese. Minimal Infrared and Ultraviolet radiation LED lighting is ideal for fresh meat. Emitting less heat into the display case than fluorescent lights. Powerstar LED protects foods from unwanted heat, reduce the rate of decay. Lower product temperatures help maintain the freshness and appearance of meats. Energy saving and long life time Opte’s led lighting boasts greatly reduced energy consumption in comparison to that of traditional light sources. In addition to operational efficiency savings, there are also savings to be made in terms of maintenance. LED light sources outperform traditional light sources in reliability, with rated lives of 50,000 hours. Please contact us for more information

How COB LED Light source works

COB LED is multi chips packaged, it can 10 times more increase lighting area, so it avoid uncomfortable glare by the maximum extent.Opte Lighting uses small size of chips to make COB LED package (CREE Citizen). By now, for small size chip, some famous LED chip manufacturer can reach 249lm/watt @ 20mA. But big size LED chip can only reach 161lm/watt @350mA. The light efficacy decrease when chip size is bigger. Also when LED driver increase current to LED, the light efficacy per watt is even low.The COB with small size chips will be a trend of LED light source package. Light spot holds the patent for invention for COB LED and lamp.  

How to calculate your LED heat sink?

in this year 2014 Guangzhou Lighting Fair,many guys using very low quality aluminum material ,and plastic to produce low price LED lighting products.But ,price after that,do you know it the radiator enough to cool the LEDs heat?Today,let’s share some knowledge about how to calculate your LED lights heat sink. The basics of LED cooling and LED heat sinks   Introduction In this document we give you a simple, straight forward approach how you can determine the correct LED heat sink for your new LED lighting design This is a simplified approach of the integral model and verification test has of course to be done, but it will give you enough insights to make sure both the functional integrity as well as the operational reliability of your design will meet the market expectations     Your design – your parameters Each LED lighting design has it’s own specific parameters, so each designer needs to take these specifics in to account and need to define his specific starting points   1. Define your expected ambient temperature Some examples: Open air mounted spot light : 30°C Recessed ceiling downlighter : 50-55°C Automotive lighting : 45°C (design point only) Tlife = -40°C up to +85°C     2. Define your LED parameters As example we take a LED COB module from the Citizen Citiled CLL020 series Model CLL020-1203A1-303M1A2 Forward current If 360mA – forward voltage Vf 40.9Vdc – power 14.7W Luminous flux 1210lm – CCT 3000K Maximum case temperature Tc 100°C – Maximum junction temperature Tj 150°C Thermal resistance of the COB module Rj-c 2.6°C/W Citizen guarantees for this module a 50.000hr life time (conditional, 70% of remaining flux) Most LED COB module manufacturers just provide lifetime expectations under ideal conditions, like 25°C ambient temperature We calculate with 90% reliability on these for the maximum junction temperature we want in our design  – example below If a B10,L70 curve is available, we suggest you determine your required lifetime and read out the maximum junction temperature Tj related In this case we want to keep our junction temperature below 90% of the Tj max => Tj required < 150°C x 90% < 135°C 3. Calculate the required LED heat sink The basics to do that is to understand the scheme at the right Each part of the design adds up some heat due to individual thermal resistances of each material – the adding up can […]

Read More

How To Choose LED Driver

Constant Current vs. Constant Voltage All drivers are either constant current (CC) or constant voltage (CV), or both. This is one of the first factors you need to consider in your decision making process. This decision will be determined by the LED or module you will be powering, the information for which can be found on the LED’s datasheet. WHAT IS CONSTANT CURRENT? Constant current (CC) LED drivers keep a constant electric current throughout an electronic circuit by having a variable voltage.  CC drivers are often the most popular choice for LED applications. CC LED drivers can be used for individual bulbs or a chain of LEDs in series. A series means that the LEDs are all mounted together in line, for the current to flow through each one. The disadvantage is that, if the circuit is broken, none of your LEDs will work. However they generally offer better control and a more efficient system than constant voltage. WHAT IS CONSTANT VOLTAGE? Constant voltage (CV) LED drivers are power supplies. They have a set voltage that they supply to the electronic circuit. You would use CV LED drivers to run multiple LEDs in parallel, for example LED strips. CV power supplies can be used with LED strips that have a current limiting resistor, which most do. The voltage output must meet the voltage requirement of the entire LED string. CV drivers can also be used for LED light engines which have a driver IC on board. WHAT IS CONSTANT CURRENT / CONSTANT VOLTAGE? Some LED drivers may feature both options of CV and CC. As standard they run as CV but, when output current passes the rated current limit, they switch to a CC mode. This functionality is suitable for applications which require a flexible LED Driver. WHEN WOULD I USE CV OR CC? CONSTANT CURRENT CONSTANT VOLTAGE LED Downlights LEDs in parallel LED Track Light LED Strips LED Spotlight LED Light Engines Mood Lighting Moving Signs Retail Lighting Stage Lighting Entertainment Lighting Architectural Lighting LED Signs Street Lighting   High Bay   Outdoor Lighting FACTORS TO CONSIDER Output Current (mA) When using a Constant Current LED driver, observe the current requirements of your chosen LED(s). The CC driver should then reflect that value output. LEDs data sheets state what they require, with the value given in amps (A) or milliamps (mA). 1 A = 1000 mA There are also […]

Read More

Our Lights Achieve Maxinum CRI 97Ra

Opte offers a full selection of LED lighting with CRI values 80+ 90+ and 97+ . This means the color accuracy and reproduction of these LEDs is nearly perfect making them an excellent choice for retail, art galleries, museums, high end homes or anywhere extreme color accuracy is required. Color rendering describes how a light source makes the color of an object appear to human eyes and how well subtle variations in color shades are revealed. The Color Rendering Index (CRI) is a scale from 0 to 100 percent indicating how accurate a “given” light source is at rendering color when compared to a “reference” light source. The higher the CRI, the better the color rendering ability. Light sources with a CRI of 85 to 90 are considered good at color rendering. Light sources with a CRI of 90 or higher are excellent at color rendering and should be used for tasks requiring the most accurate color discrimination.