D6500O燈管的色溫：6500K，標準日光光源,平均北方日自然日光（或北窗光）,代替自然光對色, 適合普通要求,大部分客戶均用D65對色。其品牌有:飛利浦PHILIPS，喜萬年SYLVANIA，OSRAM，VeriVide，GTI，通用GE，格林達-麥克貝斯 GretagMacbeth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。

GE F20W/AD ARTIFICIAL DAYLIGHT Made in Hungary
GE F40W/AD ARTIFICIAL DAYLIGHT Made in Hungary
VeriVide F20T12/D65 ARTIFICIAL DAYLIGHT，
VeriVide F40T12/D65 ARTIFICIAL DAYLIGHT
VeriVide Artificial Daylight CIE D65 F18T8/D65 MADE IN EU
GretagMacbeth F20T12/65 6500K Made in Canada
GretagMacbeth F40T12/65 6500K Made in Canada
PHILIPS TL-D 90 DE LUXE 18W/965 Made in Holland
PHILIPS TL-D 90 DE LUXE 36W/965 Made in Holland
PHILIPS TL-D 90 Graphica 18W/965 Made in Holland
PHILIPS TL-D 90 Graphica 36W/965 Made in Holland
SYLVANIA STANDARD F20T12/D65 ARTIFICIAL DAYLIGHT
SYLVANIA STANDARD F40W/54-765/RSDAYLIGHT
SYLVANIA STANDARD F20W/54-765/RSDAYLIGHT
GE F20T12-D-ECO Made in USA
GE EJG-Q750T3/4CL 120V750W Made in Hungary
OSRAM L 18W/965 BIOLUX Recyclable Germany
OSRAM L 30W/965 BIOLUX Recyclable Germany
OSRAM L 36W/965 BIOLUX Recyclable Germany
OSRAM L 36W/954-1 LUMILUX de Luxe Daylight Recyclable
OSRAM L 36W/954 LUMILUX de Luxe Daylight Recyclable
GTI ColorMatcher F17T8/CM65
GTI ColorMatcher F25T8/CM65
GTI ColorMatcher F32T8/CM65
TOSHIBA FL20S.D-EDL-D65，FL40S.D-EDL-D65