The 20W Sylvania T12 Fluorescent Tube offers a 60 lm/W luminous efficacy & produces a neutral white 3500K light that’s ideal for
...The GE 21W T5 Longlast High Efficiency has a high luminous efficacy of up to 94 lumens per watt & uses Starcoat technology for
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The T5 High Efficiency Fluorescent Tube is an A+ energy rated lamp that emits a cool white 4000K light for work applications & boasts an amazing 100 lm/W luminous efficacy.A energy rating 21W Long Last T5 high efficiency fluorescent tube Cool White, 4000k, light colour G5 cap fitting Fully dimmable
Size: L 849 x Dia 16mm