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Difference between revisions of "Philips TL and TL-D"
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== Best retro purpose == | == Best retro purpose == | ||
Flourescent lamps are the most popular and widely used lighting source. Still widely used in most indoor environments due to their high | Flourescent lamps are the most popular and widely used lighting source. Still widely used in most indoor environments due to their high efficiency and very good colour reproduction, flourescent lamp stocks and availability is still high. Millions of these lamps have been produced worldwide for decades. They are clearly suited for indoor lighting especially when paired with an electronic ballast that eliminates flicker and also increases system efficiency. Due to the great variety of lamps, there are some suggestions for use. Most flourescent lamps operate well at 25 degrees Celsius ambient temperature and have very low light output in freezing or below freezing environments but hot environments also reduce efficiency. | ||
TL Mini lamps use an obsolete design that results in very poor performance. There are only very few cases where such a lighting source was satisfactory due to their short life of around 5000 hours, quick lumen depreciation due to blackening at the tube's ends and phosphorus decay due to the lamp operation. This technology can be considered a bridge between T8 and T5 lamps but nothing else. In general, except if the light source is desirable for reference or a specific effect, these lamps should be avoided. | |||
TL Mini Super 80 lamps have been moderately improved version of the TL Mini standard lamp. Although these lamps have poor performance compared with their T8 counterparts due to the obsolete lamp gas filling that uses argon instead of krypton, their efficiency and colour reproduction is improved compared with standard TL Mini lamps. These lamps can be used on their own as accent lighting, due to their small size. | |||
TL lamps are the classic T12 flourescent light source that has been used for almost 80 years. Obsolete by 2000s standards, the lamp still survived in situations where performance in cold environments such as outdoor ones was appreciated as well as ones where the lamp's relative size resulted in less glare than T8 lamps. The lamp's performance was simply average as lamp end blackening is noticeable and the internal lamp coating does not have very good performance. Note that flicker is more visible than in T8 lamps. Overall, these lamps have been plentiful but they are somewhat scarcer today. They can be used where a diffuse light source is desirable. Although there were more advanced lamps that had Triphosphor coatings and better colour rendering, they were rare and the T12 54 or 765 type was a popular, standard, daylight flourescent lamp, widely used worldwide. It creates a good retro atmosphere when used in classic luminaires. | |||
The TL-D lamps were a significant improvement of the T12 lamp and this meant that they were extremely popular. Using less power than T12 lamps they replaced them in most installations by the early 2000s. They had slightly less light output depreciation due to the lamp's gas filling and electrodes' design. As retro lamps, they create the same atmosphere as older T12 lamps, and they are widely available due to thousands of installations that used these lamps. Popular wattages are 18 and 36W, with a more pronounced market for the 36W type. The only slight issue is that T8 lamps are less suited for outdoor installations due to their preference for warmer environments. | |||
== Understanding manufacturer data == | == Understanding manufacturer data == | ||