840灯管TLD18W/840 U30灯管（U3000，UL3000），美国商业荧光-色温3000k, 稀土商业荧光灯，用于商场照明。部份美国客户指定商店光源,如沃尔玛（wal-mart）,Sears等. Philips U30为目前市面上*受用的3000K色温灯管，举凡GretagMacbeth、GTI等国际大厂的灯箱，皆使用此灯管做为3000K色温标准光源。 PHILIPS Ultralume F30T12/30U/RS 30W Made in USA PHILIPS F20T12/30U Made in USA PHILIPS MASTER TL-D 18W/830 made in Poland PHILIPS MASTER TL-D 30W/830 made in Poland PHILIPS MASTER TL-D 36W/830 made in Poland PHILIPS TLD 30W/830 NEW GENERATION RECYCLABLE made in holland PHILIPS MASTER TLD 36W/830 RECYCABLE made in holland PHILIPS MASTER TLD 18W/830 RECYCABLE made in holland 标准光源对色灯箱专用灯管U30，它可以与TL83通用，因为它们色温都为3000K