DR450 MR16 Retrofit Review

General Information

ID #139
SKU DR450.MR16-RT-3K-40-B
Series Retrofit
Manufacturer Brightgreen (other LEDs from Brightgreen)
Fitting Type MR16 (other MR16 LEDs)
Light Type Downlight (PAR)
Height 68mm
Diameter PAR16 (50mm)
Weight 77g
Warranty 3 Years
Test Date 2013-05-31
Review Notes Contains a thermal throttling system automatically dims the light if it overheats. Web site claims running temp of 68C. Claimed 437lm to 473lm depending on model (Warm white to Cool white). Website refers to glass cover, but our unit had a notched plastic cover. Not sure how this will hold up over next 25 years. Dimming performance was a disappointment. CRI and efficiency were above average. One of our six test units failed after 12 months use. We Emailed Brightgreen but they didn't respond. Taking advantage of the 3Y warranty might proof difficult.
Price $31.90 (AUD) from gotoLighting on 27th of May 2013


LED Specifications

Claimed Measured Compared To
Watts 7W 7.6W @ 12V 54.7W @ 12V
Yearly Running Cost[?] $1.53 $1.66 $11.98
Lumens 450 lm 406 lm 765 lm
Efficiency[?] 64 lm/W 53 lm/W 14 lm/W
Lumens/Purchase Price 14 lm/$ 13 lm/$ 170 lm/$
Power Factor[?] N/A 0.96 1
Color [?] Warm White, 3000K Warm White, 3020K Warm White, 3015K
Angle[?] 40° 37° 45°
Dimmable Yes, Leading Edge Poor Yes, Trailing Edge
CRI (Color Accuracy)[?] 83 82
Life 50,000 hours Not Measured 6,000 hours
Min/Max Voltage N/A / 12V N/A
Min/Max Temperature -28°C / 70°C N/A
Measured Temperature 75°C @ 25°C ambient
167°F @ 77°F ambient
256°C @ 25°C ambient
493°F @ 77°F ambient
Flicker Percent[?] 1% 3%
Flicker Index[?] 0.002 0.008


Link to manufacturer specifications at time of testing


Dimming measurements

Graph notes: Dimming performance can be highly dependant on the type of dimmer, the number of lights in the circuit and other factors. Results in your house might vary. Mouse over the graph for more details. Position 10 = Not dimmed. Position 1 = Fully dimmed.



Distribution Graph

Angle: 37° (±18.5° from bottom), Maximum lux:

Graph notes: Shows the intensity of the light when viewed from different angles. Normal omni-directional globes have a fairly constant output all the way around (excepting directly above). Downlights have a narrow range at the bottom in which the light is emmited, this determines their angle.


Spectrum Graph

Representation of color spectrum

Graph notes: Shows the breakdown of the LED light into its component colors. With short wavelength ultraviolet on the left and long wavelength infrared on the right. The green line represents the relative absolute strength of the light at each frequency, while the red line represents what the typical human eye would see. The human eye is most sensitive to green light, but much less sensitive to purples and deep reds.


Flicker Graph

Graph of measured flicker

Percent: 1%, Index: 0.002 (lower is better in both cases)

Graph notes: Shows variation in light output over 1/10th of a second, with relative light output on the Y axis and time on the X Axis. Measured with a photodiode connected to an Oscilloscope. Ideally the yellow line should be flat. Low frequency high amplitude waveforms mean there is a possibility of noticeable flicker, but sensitivity to flicker varies between people. [More details about LED flicker]


LEDs in this Series

Name Price Watts Lumens Efficiency Color Angle Fitting
DR450 GU10 Retrofit $35 (AUD) 7.2W 355lm 64lm/W Warm White, 3066K 53° GU10
DR450 MR16 Retrofit $32 (AUD) 7.6W 406lm 64lm/W Warm White, 3020K 37° MR16
DR700 Retrofit $50 (AUD) 13.9W 670lm 69lm/W Warm White, 3060K 62° MR16


Disclaimer: While every effort has been made to ensure the accuracy of these results, each measurement carries an inherent degree of uncertainty and error. Safety and EMC compliance of products to regional or international standards have not been verified unless noted as an ENERGY STAR® LED Lighting Facts, or SSL Quality Scheme certified product. Retailers and importers selling unmarked or unapproved electrical goods can be fined or imprisoned. Mains supplied downlights require installation by a licensed electrician.