Yo!
Tu perds environ 3%.
LED Lens, COB LED Lens, LED Glass Lens, LED highbay lamp lens
1, Part Number: KB-HB100-80
2, Beam angle: 80 degree
3, Dimension: Φ100*H36mm
4, Material: Optical grade glass
5, Transmittance: 97%
6, Suitable led: 100W-200W COB Led
7, Working Temperature: -40° to +500°
8, Suitable led light: LED highbay lamp, LED industrial lamp
9, Certificates: SGS, RoHS
http://www.kingbrite.cn/index.php/article/products_read/id/336/catid/258.html
Le problème est surtout que cela a tendance à faire des "points chauds".
Si tu veux approfondir.
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