F40T12/50

D50灯管的色温为5000K被世界印刷业公认为标准色温（ICC标准），通常运用在印刷或前置出版的领域。其条件恰与白天阳光下相近，色彩虽比较正常，但不容易发现黄墨的变化，故较适合于观看原稿。其品牌有：PIHLIPS，通用GE，OSRAM，格林达 麦克贝斯 GretagMacbeth，GTI等。产品符合国际标准化组织（ISO）在2000年对标准观察环境和标准光源做出了规定，即ISO3664:2000标准。

GretagMacbeth F20T12/50 5000K 20W Made in Canada
GretagMacbeth F40T12/50 5000K 20W Made in Canada
PHILIPS TL-D 90 DE LUXE 18W/950 Made in Holland
PHILIPS TL-D 90 DE LUXE 36W/950 Made in Holland
PHILIPS TL-D 90 Graphica 18W/950 Made in Holland
PHILIPS TL-D 90 Graphica 36W/950 Made in Holland
OSRAM L18W/950 COLOR proof Daylight made in Germany
OSRAM L36W/950 COLOR proof Daylight made in Germany
Just Daylight 5000 ProGraphic 36W Made in Holland
Just Daylight 5000 ProGraphic 58W Made in Holland
GTI Graphiclite 100 F17T8/GL50 D5000 Color Viewing Lamp
GTI Graphiclite 100 F25T8/GL50 D5000 Color Viewing Lamp
GTI Graphiclite 100 F32T8/GL50 D5000 Color Viewing Lamp
GE Ecolux F20T12-C50-ECO CHROMA 50 20W USA