
PL lamps, also known as compact fluorescent lamps (CFLs) with plug-in fittings, have been a widely used light source in functional environments for decades. They are often found in downlighters, wall lights, and ceiling fixtures in offices, shops, hospitals, and public buildings. Their compact size and efficient light distribution made them a popular choice for general lighting.
PL lamps come in various types, each with its own fitting. The main differences lie in the number of pins and the specific base of the fitting, which determine compatibility with the fixture.
Type of PL Lamp | Number of Pins | Fitting Type | Typical Application |
---|---|---|---|
PL-S | 2 or 4 | G23 (2-pin) or 2G7 (4-pin) | Small downlighters, corridors, emergency lighting |
PL-C | 2 or 4 | G24d (2-pin) or G24q (4-pin) | General lighting, larger downlighters in offices |
PL-L | 4 | 2G11 | Long fixtures, large areas, line lighting |
When selecting a replacement, always pay close attention to the fitting. An incorrect fitting will not fit your fixture and will not work.
The transition from traditional PL lamps to LED variants is a logical step for many companies and facility managers. This move is not just a response to changing regulations, but also provides tangible operational benefits.
Switching to LED PL lamps requires attention to compatibility and installation methods. It is important to choose the correct LED variant that fits your existing fixture and electrical installation.
PL lamps operate with a ballast that regulates the current. For LED PL lamps, there are two main types that determine how the lamp is installed:
Method | Type of LED PL | Installation | Suitable for | Attention Point |
---|---|---|---|---|
Plug-and-play | 'Direct Replacement' (Type A) | Directly into existing fixture with compatible ballast. | Fixtures with electronic or magnetic ballast. | Check ballast compatibility. Sometimes an LED starter is needed. |
Ballast bypass | 'Mains Voltage' (Type B) | Remove ballast and connect directly to mains voltage. | Fixtures where the ballast may be removed. | Requires rewiring by a professional. |
For installers: always check whether the existing ballast is compatible with the "plug-and-play" LED variant. If in doubt, or for maximum efficiency, removing the ballast and connecting directly to the mains is recommended. This simplifies long-term installation and prevents problems with potentially failing ballasts.
When choosing an LED PL lamp, pay attention not only to the fitting and installation method but also to light quality and brightness:
Because traditional PL lamps contain mercury, they must not be disposed of with regular household waste. Return these lamps to a municipal collection point for hazardous waste or to special collection points in DIY stores or electronics shops. This ensures the materials are processed and recycled responsibly.