Standard for LED ceiling panel quality checking by eye sight

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The structure for LED ceiling panel is simple, it mainly consists of 3 parts mainly, let's do it one by one.
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Part One. Aluminum body
1.Weight- for aluminum, the more heavy, the more thick the body , the better
; D, ]7 ]9 T& l. [: ]4 {2.Material- Aluminum is better than plastic or mix materials
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: p  E! g# G- j6 lPart Two. LED
1 K4 C1 M8 w+ D# R. j9 k3 R1.Brand- There're many brands, Epistar(Taiwan brand) is the most competitive, San'an is best in Chinese brands.
3 U7 y# s; g# C) u8 w) v2.Testing by aging equipment is more direct way
2 l2 O4 L2 k: O3.Brightness- this is complex, <50lm/W and >120lm/W are neither good.  Low lumens means low brightness, >120lm/W maybe high decay=short lifespam.
' H1 I6 w7 l" I; r- k: }4.Average of lightoutput- When you look at the light, it is average, but not somewhere dark, somewhere bright.

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Part Three. Driver
1.Components- If you open the cover by screwing,the more components it has, the safer/better.
, q$ F; A* _* ]* z! X  U; j2.PF - the higher, the better.
3 L4 j# Z* v! l! k: Y) b4 g: ?2.Appearance, weight, which you can check also.

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Others
Painting, light guide panel ,and other components, you can see by eye.
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