p3.91 p4.81 rental led screen.LED National Standard

　　GB/T 23595.1-2009 Test Methods for Rare Earth Yellow Fluorescent Powders for White LED Lamps - Part 1: Determination of Spectral Properties

　　GB/T 23595.2-2009 Test Methods for Rare Earth Yellow Fluorescent Powder for White LED Lamps - Part 2: Determination of Relative Brightness

　　GB/T 23595.3-2009 Test Methods for Rare Earth Yellow Fluorescent Powder for White LED Lamps - Part 3: Determination of Chromaticity Coordinates

　　GB/T 23595.4-2009 Test Methods for Rare Earth Yellow Fluorescent Powder for White LED Lamps Part 4: Determination of Thermal Stability

　　GB/T 23595.5-2009 Test Methods for Rare Earth Yellow Fluorescent Powder for White LED Lamps Part 5: Determination of pH Value

　　GB/T 23595.6-2009 Test Methods for Rare Earth Yellow Fluorescent Powder for White LED Lamps Part 6: Determination of Electrical Conductivity

　　GB 23826-2009 LED variable speed limit signs on highways

　　GB/T 23828-2009 LED variable information signs on highways

　　GB 19651.3-2008 Miscellaneous lampholders - Part 2-2: Special requirements for connectors for LED modules

　　GB 24819-2009 Safety Requirements for LED Modules for General Lighting - LED

　　GB/T 24823-2009 Performance Requirements for LED Modules for General Lighting

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What is the difference between inline lamp beads and surface mounted lamp beads?P2.976 outdoor LED d