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: 50

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

Bud Poll replied to Hal Skinner's discussion What an RCC can do with no R- insulation in the walls.
"Hi Hal, I have no experience with your RCC product, but I can comment in regards to using a radiant…"
40 minutes ago
Trip Smith replied to Hal Skinner's discussion What an RCC can do with no R- insulation in the walls.
"Wow, that's pretty incredible. I'm curious as to what other energy upgrades he did to the…"
1 hour ago
Tom White's video was featured

Adaptive Thermostats - Western Cooling Efficiency Center Webinar

In buildings where variations in occupancy would fool a standard programmable thermostat, new adaptive thermostats have potential for significant energy savings
2 hours ago
Hal Skinner added a discussion to the group HVAC
Thumbnail

Old ductwork efficiency file

Allison,found the attached file on ductwork efficiency on an old CD I made.  Its definitely dated. …See More
8 hours ago
Hal Skinner posted a discussion

What an RCC can do with no R- insulation in the walls.

I have had a handful of folks on this forum tell me, in effect,  that an RCC can do a very good job…See More
9 hours ago
Trip Smith posted a discussion

Where to spend my marketing dollars?

Hey everyone, I'm a new home performance company owner. (Originally a general contractor who is…See More
10 hours ago
Profile IconManuel Gutierrez, Chris Baker, Sharon Cannizzo and 1 more joined Home Energy Pros
12 hours ago
Kevin Jordan replied to Kevin Jordan's discussion air infiltration total
"thanks.  but it was just an illustration of a hole 2x2 with money going out of that…"
14 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service