When choosing a suitable side emitting LED light bead, the following aspects need to be considered: Brightness requirement: Determine the required brightness based on the application scenario. Color: Choose the appropriate color according to actual needs, such as white, red, blue, RGB, etc. Size: Considering installation space and design requirements, choose the appropriate size. Light decay: Choose light beads with low light decay to ensure long-term stability and brightness. Power: Select the appropriate LED beads based on actual power requirements. Color temperature: Different color temperatures are suitable for different scenes, such as warm colors, bright white, cool colors, etc. Perspective: Choose the appropriate perspective based on application requirements. Reliability: Choose lamp beads with reliable quality and long lifespan. Cost: Consider cost factors while meeting demand.

At present, the theoretical luminous efficiency of white LED can only reach 255 lm/W. The final solid-state lighting route is to mix blue, green, and red LEDs without fluorescent powder to achieve a light efficiency of 408 lm/W. However, due to the lack of suitable green LED (i.e. green gap), this method has encountered bottlenecks.