This great value 5 pack of 4ft T8 LED tubes is available in your choice of warm white or cool white. Constructed with a nano plastic outer, they offer a better light transmittance than glass or PC tubes and reduced glare. These LED tubes are a highly durable, cost-effective, safe retrofit for T8 tubes & each one is supplied with a dummy starter. Each of these tubes: Has a length of 1200mm (including pins). Has a diameter of 27.9mm. Provides 1700 Lumens of light. Consumes 18 watts of power. Has a beam angle of 160 degrees. Has an average lifetime of around 20,000 hours. We offer a 3-year warranty on these T8 LED tubes.