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INTEGRA Bespoke Lighting
02-19-2008, 08:09 PM
Having just received a couple of brand new LED MR16 Lamp modules here for testing I decided to get into the shop and do some comparisons.

Each of the lamps below were supplied 11.9Volts AC. They were all installed into the same Lumiere 203 fixture. They were all aimed at my shop wall from a distance of 18 Feet. Measurements (in foot candles) were taken at the center of the beam, at 3' out and at 8' out.

GE BAB 20W Halogen MR16: Center 1.33 FC, 3' 1.17 FC, 8' 0.62 FC

Colorstars 5W WW LED MR16 Lamp: Center 0.64 FC, 3' 0.40 FC, 8' 0.11 FC

Luxxo 3.4W WW LED MR16 Lamp: Center 0.43 FC, 3' 0.42 FC, 8' 0.33 FC

"INTEGRA" 6.2W WW LED MR16 Lamp: Center 1.11 FC. 3' 0.98 FC, 8' 0.27 FC

I was very impressed with the quality of light that is coming out of these new Luxxo LED Lamps... although it is not nearly as bright as a BAB, it is remarkably even across the beam pattern. This would make an excellent very wide flood for soft downlighting, and will also work very well in structure mounted applications where the object is relatively close to the lamp. I am going to contact the manufacturer and see if we cannot adjust the optics some to reduce the beam spread and thus focus more output into a smaller pattern.

In a couple of weeks I will do some more tests that postion the lamps closer to the meter.

Regards.

John Pletcher
02-19-2008, 08:15 PM
You go James. Tell us all more.

pete scalia
02-19-2008, 09:16 PM
You go James. Tell us all more.

I'll be waiting by my computer screen.

Lite4
02-20-2008, 12:36 AM
Thanks for the info on the bulbs James, It is getting interesting.

NiteTymeIlluminations
02-20-2008, 07:34 AM
Can you measure the temperature?

INTEGRA Bespoke Lighting
02-20-2008, 08:19 AM
I don't have an IR thermometer yet. Both the new Luxxo lamp and my "Integra" lamp operate at a temperature that is above warm but not exactly hot to the touch. I would guess between 40c and 50c. I will look into an IR thermometer soon.

Regards.

NiteTymeIlluminations
02-20-2008, 08:23 AM
color temp

INTEGRA Bespoke Lighting
02-20-2008, 09:14 AM
All of the LED Lamps I am working with are "Warm White". I do not have a market for a lot of 4000K + lamps here. That being said the Luxxo and "INTEGRA" Lamps are burning at between 3000K and 3200K, just ever so slightly cooler then the GE MR16 Halogen. The colorstars unit I would peg as 3500K to 3700K... just a bit too cool for my liking.

No I don't have any colour temperature measuring instrument here. This is comparison only using the GE as a base line.

Regards.

NiteTymeIlluminations
02-20-2008, 09:25 AM
warm white is such a general term. 3200 is way to cold for me. I'll wait!

Grn Mtn
02-20-2008, 09:35 AM
thanks for taking the time to do these experiments, really interesting results.

JoeyD
02-20-2008, 11:24 AM
Color Rendering Index Rating?

INTEGRA Bespoke Lighting
02-20-2008, 12:07 PM
Only claimed ratings Joey. Given that these lamps are between 3000K and 3200K and the CRI on a Halogen MR16 is around 82, I would pin them at around the same place. To my eye they are pretty darned close.

How is CRI measured technically? Is there a tool?

JoeyD
02-20-2008, 12:10 PM
not sure? That is a good question I will ask our engineer.

INTEGRA Bespoke Lighting
02-20-2008, 12:13 PM
warm white is such a general term. 3200 is way to cold for me. I'll wait!

Given that a GE MR16 Halogen lamp operates between 2900K and 3050K, depending on the lamp, I would suggest to you that 3200k could not possibly be "way too cold". You must have a very critical eye to discern the difference of 150k when applied to something as variable as a landscape.

Up against a flat, even white wall you can notice a slight difference, when applied to a landscape, I don't see it.

Regards.

johnh
02-20-2008, 01:42 PM
What you need James is a good spectroradiometer. Of course you might have to let go of the boat to get one. Other than that, we must rely on posted specs, as well as visual comparison. Let me know if you pick one up though, I'd love to check it out!

John

INTEGRA Bespoke Lighting
02-20-2008, 05:14 PM
Oh gee thanks John. I don't suppose you would like to help me out on the purchase price of one of those things would you? You could always submit it as an expense to your boss... tell them it was necessary. :)

Hey, your Son is young, he won't be needing any college funds for a long time yet...