![]() ![]() Other conclusions from the Lighting Energy Alliance study: The spacing of the downlights was not altered from the normal CFL spacing. ![]() The Lighting Energy Alliance study included a photometric simulation of downlights in a hallway and found that the downlights with an LED light source exceeded IESNA illuminance and uniformity recommendations when replacing 26 watt CFL downlights. Studies done by the Lighting Energy Alliance and the Lighting Research Center at Rensselaer arrive at similar conclusions.Ī key assumption when looking at the light levels is that the downlight spacing will remain the same – which will be the case in most common upgrade scenarios. However, 42W CFL upgrades to LED currently look doubtful on the basis of lamp lumen output. Some LED replacement lamps may produce sufficient light to replace 32W CFLs. LED Lumens Suitable Replacement For 26W and 32W CFLĬomparing the lamp lumens of CFL and LED indicates that LED replacements will provide the necessary light output to replace most CFL downlights up to 26W. The rated life of LED 4-pin replacement lamps ranges from 35,000 to 50,000 hours. The existing ballast will operate the new LED lamp. If the existing CFL ballast is compatible, these LED lamps offer a simple direct replacement into the original socket. The lamps are designed for either horizontal or vertical mount applications. LED replacement lamps are available that use 4-pin G24q and GX24q sockets. The rated life of these CFLs ranges from 8,000 to 16,000 hours. They can be mounted horizontally or vertically in the downlight. CFL 4-Pin Lamp LumensĢ6W, 32W and 42W CFLs all use G24q or GX24q bases. It will focus specifically on the common 26, 32 and 42 watt CFL configurations in many commercial downlights. This post will take a closer look at the LED options available for facility managers thinking about an upgrade. This decline, has been caused by the improved performance and decreasing cost of LED pin-based replacement lamps and retrofit kits. Various independent studies have shown that the installed base of downlights using a CFL light source in commercial buildings has steadily declined over the last five years. Because of lower energy and demand costs compared to incandescent or halogen, CFL recessed downlights became a common feature in commercial, retail, hospitality and similar spaces. Before LED replacement lamps arrived on the scene, CFL pin-based lamps were the preferred light source for commercial downlights. ![]()
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