... as contour rangeHOW TO CHOOSE LUMINOUS EFFICACY OF LED PANEL LIGHT?Light source: low power SMD LEDs (placed in the edge of ... )Quick response when power on , no noise, no UV, no strobe light;Adpot own-designed LED driver with high power factort;Low ... , long lifespan, no noise, no UV, no strobe light, no pollution;Conclusion: selection LED panel light should not only consider high luminous angle ...