Helpful Rating: 174
PurchDate: June 2007
Model: 2350 Ford
ExtColor: FullBody Gray
Location: Dundee, IL
SURPRISING POWER CONSUMPTION TEST RESULTS
Testing three original florescent lights with two 8-watt light bulbs each.
Testing three 33 LED light strips
Each group of three varied within it's respective group by miniscule amounts, not enough of a difference to calculate an average.
Here are the results at battery voltage 12V
Original Florescent Lights operate at a surprising 9 watts for each twin bulb fixture. I expected it to be around 16 watts.
33 LED strips operate at 3 watts x 2 per fixture, so the LED conversion is a 6 watt fixture. This I expected.
(a previous LED strip tested prior was determined to be faulty...I won't get into why except that it got crinkled before the test)
We double checked our measurements with two different testers, one a hand-held, the other a much more sophisticated bench top piece of equipment.
The two 33 LED strip conversion reduces power consumption by only 33% because the florescent lights were much more efficient than I expected.
APPLES TO APPLES
If I had been trying to achieve the same amount of light lumens, I would have reduced the number of LEDs from 33 to 27 per strip, which would make the LED fixtures 5 watts instead of 6 watts.
Given our interior has dark cherry cabinetry, I desired a little more light, achieving an estimated 20% more. My LED conversion included mood/night lighting which also helps justify to myself that the project was worth doing. We also like the warmer look the warm white LEDs provide over the cold-blue florescent tubes. If I was going solely for reduced power consumption, I would be disappointed.
Regarding the fixture over our dinette. That fixture always had a glare to it, both as a florescent and now as an LED. It is simply positioned low putting that light in my face when looking across the table to my wife. Since that fixture is now a little brighter as an LED, I think the glare is a little worse, so the electrical engineer and I are tossing around ideas on that one. A POT (potentiometer) would be nice to adjust the voltage, but heat is a concern. So we are leaning towards a really big resistor to simply lower the voltage to the fixture to 9V-10V to a fixed lower light level.
« Last Edit: August 27, 2014, 08:13:53 pm by ron.dittmer »
Ron Dittmer (wife Irene) 2007 Model 2350 Without A Slideout
Our Rig Is Available For Viewing Any Time Of Year In Dundee, IL
Stored At Home In Our Heated Garage (Well-Lit & Warm Comfort In Winter)