T4 Fluorescent Tube / Bulb 10W

Product Information

Fluorescent tubes are measured in eighths of an inch, with the measurement being drawn from pin to pin at the end of the tube. The wattage level is dependent on the length of the fluorescent tube. The sizes of fluorescent tubing range from T2 to T17. Production of the largest size T12 (38mm) has ceased. However, they featured the same G13 cap as the T8 tube. This means that it is possible to replace the T12 tube with a more efficient T8 of the same length.

Colour Temperature: usually marked with a K rating on your bulb - you won't need this information now. This is the output color of the bulb and another colour temperature will work in your fitting. categorised as an extra warm white, this colour temperature is typically featured in fluorescent tubes designed for domestic use The T stands for tubular and the numbers are an index for the diameter (in inches) of the tube. Most tube lighting will have its size mentioned on an end of the tube. So, in most cases, you won’t have to physically measure the tube’s diameter and length. The most commonly available is the T8 bulbs. This type of fluorescent tube lighting is the most popular because of its high CRi and many color temperature options.

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T4 fluorescent fittings have been discontinued since 2015 due to EU regulations. The electronics are located in the light fitting and not the tube. If you are finding your lamps are not lasting as long as expected, this would indicate a fault in the light fitting and not the tube - unless the tube is physically smashed it's very unlikely to have a fault. You can test tubes and fittings by swapping tube from another working fitting. Unfortunately manufacturers no longer provide a guarantee for T4 tubes, as the light fittings they are installed into may be approaching the end of their life. This 30w bulb is 748mm long excluding pins and 762mm long including pins. The manufacturer specifies a tolerance of +/- 2mm for these tubes. These light sources are unusual, smaller fluorescent fittings that were previously installed in a variety of different applications to provide customers with bright general lighting in homes, commercial properties, or offices. Although they aren’t as common anymore, you may still have existing fittings that need replacing. If you’re looking to replace a current fitting in a unit you’ve already got, we have a wide selection of T4 tubes. Once considered most effective in large spaces, like schools and supermarkets, fluorescent tubes were also found to be just as effective in smaller spaces like garages, conference rooms or simply under your stairs at home. Wherever your fitting is, we provide a vast selection to accommodate what you’re looking for. On the other hand, T5 tube lights are little powerhouses when comparing T5 vs T8 tube sizes. Compared to a T8, T5 tube can achieve higher luminous flux using less power. If you are using T5 lights for garage lighting or an art display, then make sure that you choose a model with a higher Color Rendering Index, CRi. The CRi of T5 fluorescent bulbs generally range in the lower end of 70 -80 but there are options with more accurate color rendering up to 95. Basically that means the light color can go from daylight white to extra warm white.

The number of watts will be indicated after the F on the fluorescent tube. As an example, an F8 tube with 24 watts will have the number F24T8. The level of light output will also have a bearing on the wattage of the fluorescent tube. The efficacy of the fluorescent tube will range from around 16 lumens per watt for a 4-watt tube with a regular ballast to more than 100 lumens per watt for a tube featuring a modern electronic ballast. The level of light emitted from the fluorescent tube is also affected by the lamp temperature in the coldest area of the lamp. Fluorescent Tube Choices by Size also classified as a warm white, fluorescent tubes featuring this level of colour temperature share lighting properties with halogen lamps However, there are still many office spaces and homes that use the T12 fluorescent tube lights, especially in older buildings. Another reason why they are still used is the cheaper purchasing price compared to the others, but, they are no longer being made.You should be aware that lumens are specific to the total amount of light emitted by the light source, while watts refer to the amount of energy consumed. As the levels of energy efficiency increase, the wattage decreases in relation to the generation of lumens. This is a 30w T4 tube that is 762mm long including the pins at each end. It is used in under cupboard lights and some illuminated mirrors. There will be some variation in the amount of lumens generated by fluorescent bulbs given the type and efficacy of the lamp. However, the majority of fluorescent bulbs generate between 45 and 100 lumens per watt. A 20-watt tube may then be expected to generate between 90 and 100 lumens. The wattage and lumen levels have a direct bearing on running costs. How Much is a Fluorescent Light Bulb? Ideally, there will be legible coding on the fluorescent tube indicating the key characteristics. As an example, you might see the code F32T8. The F in this instance will indicate the fluorescence. The 32 corresponds to the number of watts or length in inches. The T is specific to the tubular shaping. Finally, the 8 corresponds to the diameter in eighths of an inch (this may be represented in millimetres rounded to the nearest millimetre). What Does a Starter Do in a Fluorescent Light?