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Difference between revisions of "Philips TL5 HO and TL5 HO 90 De Luxe"
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Philips TL5 HO and TL5 HO 90 De Luxe (view source)
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High colour rendering | High colour rendering TL5 fluorescent linear lamps type HO and HO 90 De Luxe | ||
== Features == | == Features == | ||
*Triphosphor internal coating outer bulb ( | *Triphosphor internal coating outer bulb (TL5 HO) | ||
*Triphosphor internal coating and additional coating (TL5 HO 90 De Luxe) | *Triphosphor internal coating and additional coating (TL5 HO 90 De Luxe) | ||
*Bi-pin base | *G5 Bi-pin base | ||
*Color rendering index Ra of 80 to 95 | *Color rendering index Ra of 80 to 95 | ||
*Typical lifetime of 24.000 hours | *Typical lifetime of 24.000 hours | ||
*Luminous efficacy of 89 to 104 lumens/watt | *Luminous efficacy of 89 to 104 lumens/watt | ||
* | *Different white appearances (from 2700 to 6500 K colour temperature) | ||
*Universal operating position | *Universal operating position | ||
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90 De Luxe lamps have balanced, good colour reproduction with a slight efficiency reduction compared with Super 80 lamps. Due to their slightly higher sale price and slightly lower luminous flux, they were significantly less popular than Super 80 lamps. The major benefits of these lamps is that colour reproduction is very close to natural light, offering a highly realistic perspective on the environments. 90 De Luxe lamps can showcase fine goods, furniture, creating a pleasant, comfortable atmosphere in offices, living and dining rooms, bedrooms. | 90 De Luxe lamps have balanced, good colour reproduction with a slight efficiency reduction compared with Super 80 lamps. Due to their slightly higher sale price and slightly lower luminous flux, they were significantly less popular than Super 80 lamps. The major benefits of these lamps is that colour reproduction is very close to natural light, offering a highly realistic perspective on the environments. 90 De Luxe lamps can showcase fine goods, furniture, creating a pleasant, comfortable atmosphere in offices, living and dining rooms, bedrooms. | ||
== Understanding manufacturer data == | == Understanding manufacturer data == | ||
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|- style="background:#efefef;" | |- style="background:#efefef;" | ||
! Designation !! Base !! Lamp wattage !! Luminous flux !! Colour appearance !! Colour Temperature !! Colour Rendering Index (Ra8) !! Life (to 50% failures) | ! Designation !! Base !! Lamp wattage !! Luminous flux !! Colour appearance !! Colour Temperature !! Colour Rendering Index (Ra8) !! Life (to 50% failures) | ||
| MASTER TL5 HO 24W/827 || Miniature Bipin || 24 W || 1750 lm || Incandescent White || 2700 K || 85 || 24000 hours | | MASTER TL5 HO 24W/827 || Miniature Bipin || 24 W || 1750 lm || Incandescent White || 2700 K || 85 || 24000 hours | ||
|- | |- | ||
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Notes: | Notes: | ||
* Neutral white colour appearance lamps were seldomly used as the 3000, 4000, 6500 K lamps offered satisfactory variety; the 3500 K lamps or neutral white were traditionally popular in the United Kingdom; | * Neutral white colour appearance lamps were seldomly used as the 3000, 4000, 6500 K lamps offered satisfactory variety; the 3500 K lamps or neutral white were traditionally popular in the United Kingdom; | ||
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90 De Luxe lamps were very good flourescent lamps. Combining the efficiency of Super 80 lamps with the uniform spectrum allowed by certain technologies developed for TL-D standard lamps made the 90 De Luxe lamps a near high-end choice. With very good colour reproduction, quite high system efficiency and comfortable light with similar colour appearance choices as with Super 80 and standard TL-D lamps, 90 De Luxe lamps were offering major benefits in lighting unsurpassed by previous technologies. Although De Luxe lamps were developed in late 70s they suffered from reduced system efficiency and higher price which limited their market attractiveness. The new 90 De Luxe lamps offered good enough energy efficiency and light output to be competitive which meant that these flourescent lamps started to be more successful. However, their slightly higher cost and wide availability of Super 80 lamps made 90 De Luxe lamps a quite rare presence except in more demanding commercial and residential applications. | 90 De Luxe lamps were very good flourescent lamps. Combining the efficiency of Super 80 lamps with the uniform spectrum allowed by certain technologies developed for TL-D standard lamps made the 90 De Luxe lamps a near high-end choice. With very good colour reproduction, quite high system efficiency and comfortable light with similar colour appearance choices as with Super 80 and standard TL-D lamps, 90 De Luxe lamps were offering major benefits in lighting unsurpassed by previous technologies. Although De Luxe lamps were developed in late 70s they suffered from reduced system efficiency and higher price which limited their market attractiveness. The new 90 De Luxe lamps offered good enough energy efficiency and light output to be competitive which meant that these flourescent lamps started to be more successful. However, their slightly higher cost and wide availability of Super 80 lamps made 90 De Luxe lamps a quite rare presence except in more demanding commercial and residential applications. | ||
== Operation == | == Operation == | ||
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Flourescent lamps were an evolution of clear mercury vapour lamps. Development followed two avenues to increase efficiency, low pressure mercury vapour discharge and high pressure mercury discharge. High pressure mercury discharge created more useful light but the same deficit of no red and orange light was present so the light was still unsatisfactory. Low pressure mercury discharge is very efficient but not in outputting visible light, it is on UV-light emission. This UV-light is useless if it cannot be converted to visible light. | Flourescent lamps were an evolution of clear mercury vapour lamps. Development followed two avenues to increase efficiency, low pressure mercury vapour discharge and high pressure mercury discharge. High pressure mercury discharge created more useful light but the same deficit of no red and orange light was present so the light was still unsatisfactory. Low pressure mercury discharge is very efficient but not in outputting visible light, it is on UV-light emission. This UV-light is useless if it cannot be converted to visible light. | ||
Flourescent powders were developed to convert UV-light into visible light. Some of these powders were capable of emitting light at some wavelengths, making specific colours to be cast around but they had to be quite | Flourescent powders were developed to convert UV-light into visible light. Some of these powders were capable of emitting light at some wavelengths, making specific colours to be cast around but they had to be quite resistant to UV-light and efficient. This meant that some time passed until the advent of halophosphate based colours that made possible the first daylight T12 flourescent lamps, around late 1930s. This was a major achievement as such lamps had the capability of directly competing with incandescent lamps and offer better efficiency and longer life. | ||
Subsequent developments improved lamp life and created a wide variety of flourescent powders that cast white light with different colour appearances from warm and neutral to cold and daylight. Higher and lower power lamps were created and standardization established. The preferred lamp gear turned from incandescent ballasting or mixed light to magnetic or reactive ballasts, which improved system efficiency. In the late 1970s, following requirements for higher energy efficiency due to the world oil crisis of 1973, there were major advances in technology. | Subsequent developments improved lamp life and created a wide variety of flourescent powders that cast white light with different colour appearances from warm and neutral to cold and daylight. Higher and lower power lamps were created and standardization established. The preferred lamp gear turned from incandescent ballasting or mixed light to magnetic or reactive ballasts, which improved system efficiency. In the late 1970s, following requirements for higher energy efficiency due to the world oil crisis of 1973, there were major advances in technology. | ||
The advent of high efficiency tri-band or tri-phosphorous lamps was the most important landmark. Successful development of flourescent powders that had peak UV to visible light conversion at blue, red, and green colours with peaks near the ideal wavelengths made it possible to release lamps with specific colour appearances. This high energy in light conversion was complemented by changes in the lamps gas's fill from argon to Krypton, reducing thermal losses with a slight increase in operating voltage and starting voltage. This was the market releases of the the highly successful T8 lamp, or TL-D lamp that dominated since the early 90s. Of course, up until this time there were improvements in cathodes design and electron | The advent of high efficiency tri-band or tri-phosphorous lamps was the most important landmark. Successful development of flourescent powders that had peak UV to visible light conversion at blue, red, and green colours with peaks near the ideal wavelengths made it possible to release lamps with specific colour appearances. This high energy in light conversion was complemented by changes in the lamps gas's fill from argon to Krypton, reducing thermal losses with a slight increase in operating voltage and starting voltage. This was the market releases of the the highly successful T8 lamp, or TL-D lamp that dominated since the early 90s. Of course, up until this time there were improvements in cathodes design and electron emissive coatings as well as other performance enhancing solutions but the release of the TL-D lamp was the most important moment. | ||
Production of specialist lamps started in the 1950s with coloured lamps but also expanded to include De Luxe and specific lamps that would cater for many purposes. De Luxe lamps were an improvement of standard lamps in terms of colour | Production of specialist lamps started in the 1950s with coloured lamps but also expanded to include De Luxe and specific lamps that would cater for many purposes. De Luxe lamps were an improvement of standard lamps in terms of colour reproduction but was less efficient and had shorter service life due to coatings that were less stable in time than standard lamps. The advent of the tri-band TL-D flourescent lamp opened up the possibility of using part of its development to release new De Luxe lamps by combining such phosphorus coatings with previously developed ones. The result was a more stable, higher efficiency De Luxe lamp. Graphica lamps were a slight adaptation of previously developed phosphorus to TL-D lamps and their gas's fill and some experimentation in improving other aspects of operation to achieve better performance. | ||
== Manufacturing specificities == | == Manufacturing specificities == | ||
Philips flourescent lamps had very good manufacturing tolerances and the lamp's construction along with flourescent powder quality made reliable, predictable operation entirely ensured. Other world manufacturers were capable of similar performance. However, some slight differences were noticeable. For instance, Philips had slightly less powerful red | Philips flourescent lamps had very good manufacturing tolerances and the lamp's construction along with flourescent powder quality made reliable, predictable operation entirely ensured. Other world manufacturers were capable of similar performance. However, some slight differences were noticeable. For instance, Philips had slightly less powerful red phosphorus than Osram, which means that entirely equivalent lamps from both manufacturers had slightly different colour appearance. On the other side, Chinese branded lamps were much inferior in terms of flourescent powder quality and colour reproduction as well as efficiency and service life. | ||
{{footnotes| | {{footnotes| | ||