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For the choice of parameters of LED grow light, including the selection of the ratio of red and blue, the intensity of the light source and the power selection options.

3.1 red LED and blue LED proportional selection

For the LED grow light demanding on the red and blue, chromatography proportion of red and blue light emitted by LED grow lights is generally preferably between 5:1 and 10:1, 7 to 9:1 is typically optional ratio. Of course, red and blue light different plants need will be different, and the choice of different red LED and blue LED is not the same, so how to choose the optimal ratio should be based on the type of plant and the performance of the LED grow lights.

Figure 1 Different proportions of red and blue LED make different effect on the growth of plant

FIG 5 is a a group experiment Taiwan mechanism used different proportions of red and blue LED to conduct， which show that the resultant vegetable growing is best and heaviest compared with other vegetables when the ratio of red / blue LED is 90/10.

The text cited literature data to further analyze the effect red and blue light make on plants so that better illustrate that red and blue light affect plant growth, shown in Figure 2, Figure 3 and Figure 4.

Figure 2 blue light affect the root growth of plants

Figure 3  red light affect the growth of plant stems

Figure 4 red light affect the growth of plant stems

Figure 2 shows that the lack of blue light is unfavorable to the development of the plant roots.

Figure 3 and Figure 4 shows that red light especially infrared light is conducive to plant stem elongation, but the stem of plants is relatively thin when there is infrared light.Browsing http://www.lead-ledgrowlight.com/ for more information about LED grow lights.

Article from http://blog.lead-ledgrowlight.com/index.php/how-do-the-led-grow-light-affect-the-growth-of-plant/

American International Lighting Fair—LIGHT FAIR International (LFI)was held at Las Vegas Convention Center on June 1-5, 2014，which had attracted more international lighting brands exhibitors this year, besides CREE, Hubbell and other big-name in US，there are some well-known brands such as TCL, BYD and so on. The exhibition was packed and very lively on the first day.

On the Lighting Fair, LED lighting products including indoor LED ceiling light  other home and commercial LED lighting are full of creative design, which are applied with more people-oriented. Osram had shown some of the advanced lighting research and indoor LED ceiling light and other indoor and outdoor lighting application on this exhibition,include: how to apply lighting at Children’s Hospital to allow the sick children to be more relaxed in the ward so that reduce children’s perception of pain; for the hotel and home lighting applications, their study had concluded that people can reduce stress in the indoor LED ceiling light environment where the color temperature is lower than 2400K, thereby improving the quality of sleep; in the workplace, application-specific lighting, allowing employees to work more focused.

In addition to showcasing the latest products and advanced indoor LED ceiling light and other indoor and outdoor LED lighting applications, some of the professional lighting related to home construction had been exhibited on the show: such as outdoor lighting control systems and intelligent lighting solutions; intelligent engineering applications of the city, such as smart parking lighting applications. Apparently, the American indoor LED ceiling light and other household and outdoor LED lighting is closely linked with home architectural, decorative lighting.Browsing http://www.ledclan.com/led-ceiling-light/12-watt-led-ceiling-light.htm for more information about indoor LED ceiling light.

Article from http://www.lighting-ledlight.com/index.php/american-light-fair-international-lfiwas-held-at-las-vegas-convention-center-on-june-1-5-2014/