The Benefits of Cold Cathode Lamps
Forgive me for I have dimmed: A fixture restoration at a church prompts an epiphany about cold cathode lamps.
Our church is restoring two chandeliers with three rings of lamps, totaling 38 lamps. Presently, the rings are incandescent. The lamps on the top two rings are exposed so we want them to be decorative, preferably globe-shaped. We had planned on using compact fluorescent lamps, but a local lighting retailer suggested we consider cold cathode lamps. He says the CCFLs are dimmable like incandescent lamps. Our lighting consultant says the color temperature should be 3000K or 3500K for our application. What do you think? And where can we find the right lamps?
Using dimmable cold cathode lamps (known as CCFLs) is a good way to go. They have an average rated lamp life of 25,000 hours, as compared to CFLs at 10,000 hours. You can get them in a globe shape (known as a G-lamp), but make sure to get ones that have white glass envelopes, because they also come in a clear or frosted versions that would show the spiral tubing within. Take a look at those made by TCP (www.tcpi.com). They offer a smaller diameter 3W G20 (8G2003WH) that gives the equivalent of 15 to 20 watts worth of illumination, or the slightly larger-diameter 5W G25 (8G2505WH) that gives 25 to 30 watts worth of illumination and the 8W G25 (8G2508WH) that gives 35 to 40 watts. If there are other companies out there making dimmable CCFLs let me know and send me samples to test. I am happy to get the word out about any company that makes a good product. As far as color temperature goes, I would lean toward a 2700K as opposed to the cooler 3000K or 3500K, especially if there are incandescent lamps being used in other lighting fixtures in the church. The color differentiation would be noticeable, especially since CFLs and CCFLs don’t get more yellow when they are dimmed, as incandescent lamps do. But if you change out all the lamps in all the fixtures to CCFLs with a 3000K temperature then that would be good way to go as well.
Randall Whitehead, IALD
Lastest from ask randall
The best lighting for illuminating your face at a mirror is side lighting, also referred to as cross illumination. This would be a pair of fixtures... read full story
Even though I'm all about energy-efficient lighting and have replaced 98 percent of my incandescent light with alternative light sources, the one... read full story
Natural light is definitely ideal for applying makeup when you're being seen during the day. So when you are getting ready for work it's better get... read full story
Sponsored by Access Lighting, Engineered Lighting Products, Langlais Group Inc., LTF and Pure Lighting/Edge Lighting. Complimentary live webinar will take place at 2 p... read full story
Sponsored by Access Lighting, Engineered Lighting Products, Ferguson, GM Lighting and Maxim Lighting/ET2. This webinar has already taken place, but you can view an... read full story
Sponsored by Access Lighting, AFX Inc., Engineered Lighting Products, Langlais Group and Pure Lighting/Edge Lighting. This live webinar has already taken place, but... read full story