LGBL-Light Guide Back Lights & BL-Back Lights Difference?

LGBL (Light Guide Back Light) uses side-edge light input from both sides of the light bar, with approximately 70% uniformity. 

In contrast, BL (Back Lights) provide about 80% uniformity. 

The brightness of LGBL is approximately one-tenth that of BL.

The advantages of LGBL are its slim profile and lower cost, making it suitable for large-area illumination applications. 

BL (Back Lights) use direct back illumination, with LEDs fully distributed across the entire surface；therefore, the brightness is significantly higher than that of LGBL.