PART V: “LIFETIME” Lifetime is a critical index for evaluating lighting fixtures. Conventional lighting fixtures are relatively inexpensive, of which the most widely adopted type is the fluorescent light, with only 3000 hours’ longevity. Compared to that, LED lights are...
PART IV: “COLD LIGHT SOURCE” Before LED lighting technology came to maturity, greenhouses were the major form of artificial plant factories. In greenhouses, temperature condition can be better controlled than plants grown outside, and sunlight is obtained during the day...
PART III: Light Quality Compared with the factor of LED viewing angle we discussed last time, our topic today–light quality is a more significant index in terms of which LEDs have a revolutionary advantage over conventional light sources. The emergence and growth of...
Part II: Viewing Angle In our last post, we talked about the significance of lighting for pant growth in terms of light intensity, photoperiodism and light quality. In plant growth, light intensity is expressed as photosynthetic photon flux density (PPFD)....
Part I: Background Light, just like water, soil, temperature and air, is indispensable for plant growth. Man had realized the importance of water, soil and temperature in growing plants since a long time ago, and had begun to utilize irrigation,...
Starting from June 9th 2017, the 22th Guangzhou International Lighting Exhibition 2017 (GILE 2017) held at China Import and Export Fair Complex gathered over 2,000 exhibitors from 30 countries. Within 18 halls and over 2000 booths, extensive knowledge, up-to-date...
Technology develops because of human needs, and it raises new needs of human. Because of our desire for brightness and fear of darkness, artificial lights came along. Due to limitation of technologies, the original pursuit of artificial lights was illumination....
Recently, the International Commission on Illumination (CIE) released the CIE 2017 Color Fidelity Index for Accurate Scientific Use. The CIE Color Rendering Index (CRI), in particular the general color rendering index, Ra, is widely adopted and used by the lighting...
—— YUJILEDSTM High Lumen Density High CRI COB Series Thanks to the development of science and technology, men are able to use natural resources increasingly efficiently. The development and application of solid-state lighting (SSL) technology is a good example. Traditional...
There are numerous buyer’s guides nowadays on how to choose a desk lamp for you. Considerations include the place, interior design, the lamp’s size, style, and its functions. As an expert in high quality light source, YUJILEDSTM knows what qualities...
#4-LED PHOSPHOR During the last several posts, we’ve analyzed the leading factors of LED lead frames, chips and encapsulants in terms of their qualities and costs. Now, we are moving to the finale of our “high quality LED” series, the...
#3-LED ENCAPSULANT After analyzing LED lead frames and chips in terms of their qualities and costs, this time we will talk about another component in all LED products—the encapsulant. LED packaging encapsulant As we know, the chip is the core...