D50標準光源燈管的色溫為5000K被世界印刷業*為標準色溫（ICC標準），通常運用在印刷或前置出版的領域。其條件恰與白天陽光下相近，色彩雖比較正常，但不容易發現黃墨的變化，故較適合于觀看原稿。其品牌有：PIHLIPS，通用GE，OSRAM，格林達 麥克貝斯 GretagMacbeth，GTI等。產品符合標準化組織（ISO）在2000年對標準觀察環境和標準光源做出了規定，即ISO3664:2000標準。

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