G13 Fluorescent Tube Bulb 1500mm 58W 5250lm - Warm White 3000K

A 5ft fluorescent tube, 1500mm from cap to cap, with the standard G13 two pin connectors at each end. It draws 58W and puts out 5250lm at 3000K, a warm white rather than the bluish light many people still associate with fluorescent lighting. The glass carries the Eveready F58 T8/830 marking: T8 is the 26mm barrel that has been the common batten size in UK garages and workshops for years, and 830 is the usual lamp shorthand, the 8 standing for the colour rendering group and the 30 for the 3000K colour.

This is a replacement lamp for an existing 5ft batten or diffused fitting rather than a complete fitting, so it runs on whatever control gear is already in the housing. It suits garages, workshops, utility rooms, storerooms, garden rooms and back of house areas in shops and small commercial units, anywhere a long even wash of light matters more than a decorative one. Keep it to dry indoor positions: the IP20 rating means the tube has no protection against water, only against fingers and larger solid objects.

There is no dimming here. The specification lists the tube as non-dimmable, so run it from an ordinary switch and leave dimming to another circuit. Its energy class is G, with consumption rated at 58kWh per 1000 hours, which is a fair guide to what a tube of this output costs to run against a modern LED alternative. No rated life and no incandescent equivalence are printed for this lamp, so we quote neither. Each unit is one tube, and the minimum order is 25, sold in multiples of 25, which suits keeping spares on a shelf or in a maintenance van.

Will this fit my existing 5ft fluorescent fitting?

It will if the fitting takes a 1500mm T8 tube on G13 bi-pin holders. Measure the old tube end to end and check that each end has two short pins rather than a single pin.

What does the F58 T8/830 marking on the glass mean?

F58 is the 58W fluorescent rating and T8 the 26mm barrel diameter. The 830 is the usual lamp shorthand: the 8 gives the colour rendering group and the 30 the 3000K colour temperature.

Can it be dimmed?

No. The specification lists this tube as non-dimmable, so wire it to a plain on and off switch. If you need dimming you will need a lamp and control gear rated for it.

How bright is 5250lm, and what does 3000K look like in the room?

5250lm is enough to light a single garage or a decent sized workshop from one run. At 3000K the light reads warm and slightly yellow, closer to a household bulb than to office white.

Does the manufacturer state a rated life or an equivalent wattage?

Neither figure is printed for this tube, so we quote neither. What is stated is the 58W draw, the 5250lm output and the energy class of G at 58kWh per 1000 hours.