What are inspectors using to detect the type of lighting found in residential applications? I need a meter to help detect CFL and LED lights so I don't have to get a ladder and remove shrouds.

Thanks.

Tags: CFL, light, lighting, meter, tools

Views: 85

Replies to This Discussion

If the question is "incandescent vs. compact fluorescent" OR "cfl vs. LED" -- then a diffraction grating will help. Go to a toy store and find the little cardboard glasses with plastic lenses that make every light bulb look like a rainbow.

See the attached handout. Incandescent lamps radiate across all visible wavelenghts, so in a diffraction grating you see a spectrum of colors all blended together. CFL's have 4, 5 or 6 phosphors blended together. The lamp makes light that we see as "white", but in fact each phosphor radiates at a very specific wavelength. Through a diffraction grating, you can see multiple images of the light source, each with the different color produced by that phosphor.

WHITE LEDs are doped to radiate across most of the visible spectrum. So a diffraction grating shows the same "smeared" continuous specturm as an incandescent bulb.

You can see this effect even if the lamp is in an enclosed luminaire -- the image of the luminaire will take on the property of the light source inside it.

So, in an older home that has not seen dedicated energy efficiency work recently, the question is probably "incandescent or CFL?" A diffraction grating will show the difference. In a home where the owner pursues energy savings, the question is probably "CFL or LED?" A diffraction grating will sort them out. If the space could well have incandescents AND LED lamps -- good luck.

Attachments:

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Don Hynek replied to Luis Hernandez's discussion Non-continuous exterior insulation
"This is a matter of far more than R-values. Average exterior temp, heating load vs. cooling load,…"
3 hours ago
Patrick Michaelyan replied to Luis Hernandez's discussion Non-continuous exterior insulation
"Don, I'd like to ask you specifically about your comments on putting the structure at great…"
8 hours ago
Patrick Michaelyan replied to Casey Gesell's discussion Looking for home improvement companies to join our dealer network!
"Casey, Time frame for relocating is late spring to early summer. I am considering both counties…"
9 hours ago
Dennis Heidner replied to Patrick Michaelyan's discussion Vinyl Siding with Integral Insulation
"The observation about rot is important.   I agree. One of my complaints with some of the…"
Friday
Jennifer Schenk added a discussion to the group Job Board
Thumbnail

Job Opening - Energy Programs Manager - Frisco, CO

Energy Programs Manager - High Country Conservation CenterJob DescriptionGeneral Description of…See More
Friday
Jennifer Schenk joined Diane Chojnowski's group
Thumbnail

Job Board

This group is for posting jobs related to all aspects of the home performance industry including…See More
Friday
Avi Yashchin posted a status
""Will Online Learning Replace the Classroom?" Read my full article on HuffPost. http://huff.to/1cNCOie"
Friday
Profile IconTerrell, Jennifer Schenk, Amina Lang and 3 more joined Home Energy Pros
Friday

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service