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
A man cave/wine cellar? Are you planning to a lot of drinking alone? If so, then I'm in! You want to add four types of lighting here, just as you... read full story
Thank you for your very detailed question. I'm glad that you're using LED linear lighting above and below the cabinets. As I mention in many... read full story
The rule of thumb is to have the shade part (luminous section) of the fixture even with your eye level. If you stand when at the vanity, then I would... read full story
Sponsored by CSL, Fanimation, Pure Lighting/Edge Lighting and USA LED Lighting Solutions. Wednesday, June 10, 2-3 p.m. EDT Register for this free CEU webinar by... read full story
Archived CEU Webinar: LED Lighting 202 - LED and Solid-State Lighting Design Update for Residential Applications
Sponsored by Emerson, Ferguson and Pure Lighting/Edge Lighting. This free CEU webinar has already taken place, but you can watch the archived presentation on-demand by... read full story
Sponsored by Pure Lighting/Edge Lighting and Spotlite-USA. This live webinar has already taken place, but you can still view the presentation on demand by clicking... read full story