cwf燈管為美國冷白商店光源(cool white fluorescent) 色溫：4150k ，美國客戶常用；公司代理品牌有：飛利浦 pihlips，奇異ge，喜萬年 sylvania等。
philips tl-d 18w/33-640 made in poland
philips tl-d 36w/33-640 made in poland
sylvania f20t12/cw cool white usa
sylvania f20t12/cw cool white canada
sylvania f20w/33-640/rs cool white made in germany
sylvania f30w/33-640-t8 cool white made in germany
sylvania instant rapid start f20w/33-640/irs cool white
sylvania f40w/33-640/irs cool white made in germany
sylvania f30t8/cw cool white made in usa
ge f20w/33-640 cool white made in hungary
ge f40w/33-640 cool white made in hungary
ge f20t12-cw-eco 20w usa