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. Despite being an older model, the T12 fluorescent tube lights still offer a range of color temperatures at different watts. However, their limited lifespan of 15,000 hours still makes T12 fluorescent lights a less attractive option compared to the smaller fluorescent tube lights or LEDs. Frequently Asked Questions: The watts needed for T5 lighting will increase with the type of output. For example, a NO-T5 tube light can range between 14 watts to 35 watts while an HO-T5 fluorescent tube light will usually range between 24 watts and 80 watts. T8 Fluorescent Lighting T4 tubes are the smallest of the fluorescent bulb sizes, at only 4 eighths of an inch (0.5 in). Their size is what makes T4 lights popular for under cabinet lighting purposes and accent lighting for displays or a staircase. Compared to T5 lighting, the 8 Foot T8 tube lights are less economical. T8 lighting tends to be more expensive and have a shorter lifespan of around 15,000 hours, but can last up to 50,000 hours if you choose the LED alternatives.

categorised as an extra warm white, this colour temperature is typically featured in fluorescent tubes designed for domestic use When considering the question of how do I know which fluorescent light bulb to buy you need to figure out what you currently have. Once you have removed the bulb most will be marked with the type on the end, if there are no markings then you can measure the tube diameter to determine their type. What are the different types of fluorescent tubes? also classified as a warm white, fluorescent tubes featuring this level of colour temperature share lighting properties with halogen lamps The "T" in lamp terminology represents the shape of the lamp tubular. The number following the "T" usually represents the diameter of the lamp in eighths of an inch (1 inch equals 2.5 centimetres). Tube Type

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T12 fittings use a magnetic start ballast which is less energy efficient. The smaller and newer models have already been fitted with the more energy-efficient electric ballasts. The ballast is what regulates the current to the fluorescent lamps and provides sufficient voltage to start the lamps This 30w bulb is 748mm long excluding pins and 762mm long including pins. The manufacturer specifies a tolerance of +/- 2mm for these tubes. These tubes from Leyton Lighting have plastic end caps that can be removed. This makes the tube slightly shorter which can help with installation into some brands of light fitting. 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.

Think about these differences in tube lighting the next time you need to convert fluorescent lighting to LED. The different sizes are not directly interchangeable so if you want to use another size then you will have to do a bit of handiwork. coming under the category of bulk standard white, this colour temperature is considered suitable for a wide variety of commercial purposes 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. Fluorescent lighting is economical to run and uses long-lasting tubes to provide bright and effective general lighting. T4 fluorescent tubes are ideal for home and commercial use for kitchen worktops, in cabinets, under stairs, as a pelmet lamp, or to create a well-lit workstation for DIY, craft, or commercial use. T5 bulbs are great for large space such as schools, supermarkets, offices, and underground railways. T8 bulbs can be used in schools, garages, offices, conference rooms, retail stores, and most other environments.T4 tubes have an impressive lamp life of up to 10,000 hours and require a lot less energy to produce light compared to traditional light bulbs, in fact, fluorescent lamps save 60% on energy usage compared to incandescent lights. There are still so many existing T4 fittings out there that constantly need replacing, but as they decrease in popularity, it can be hard to find the right replacement. At BLT Direct, we’ll help you to find the right fitting you need to instantly re-energise your space. Whether you used your fluorescent light to highlight a certain area of your house or brighten up your workspace to boost productivity, we have a range of sizes that are ideal in any environment. There is no industry standard for the length or wattage of T4 tube lights. They can range anywhere from 6 watts to 30 watts, the lower the number the lower the energy consumption , and many lengths. 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. Another aspect to remember about T5 fluorescent lighting is the different output possibilities. There are three levels of output available on the market; normal output (NO), high output (HO) and very high output (VHO). Now you know all you need to about fluorescent tubes sizes and their differences. But below we will answer the questions that people ask us the most. What is the difference between T5 T8 and T12 lights?

The energy efficiency of the T5 tubes means they also last the longest, around 20,000 hours. However, this is still less than half of the expected lifespan of a T5 LED tube light which lasts an average of 50,000 hours. 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 SizeThe 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. Both the colour temperature and colour rendering index will have a bearing on the appropriate choice of fluorescent tubing. The colour temperature corresponds with the warmth of the light. Warmer tones will have a yellowish appearance, while cooler shades will be relatively bright. 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?