6W GU5.3 LED Review

General Information

ID #314
SKU 15042
Series N/A
Manufacturer Mort Bay (other LEDs from Mort Bay)
Fitting Type MR16 (other MR16 LEDs)
Light Type Downlight (PAR)
Height 45mm
Diameter PAR16 (50mm)
Weight 46g
Warranty 1 Years
Test Date 2014-08-29
Review Notes This downlight is not dimmable. It carries a C-Tick approval marking and is billed as a 50W halogen equivalent, despite having a much lower lumen output than typical 50W halogens. Average efficiency for a MR16 LED & average CRI value. Poor power factor. Falls roughly in the middle of the pack with respect to all the MR16 LEDs we have looked at to date. Sold as a 3 pack for $45. No warranty information could be found. MortBay doesn't seem to have a web site or any customer support at the time of the review.
Price $15 (AUD) from Masters Home Improvement on 27th of August 2014


LED Specifications

Claimed Measured Compared To
Watts 6W 6.6W @ 12V
Electronic Transformer
54.7W @ 12V
Yearly Running Cost[?] $1.31 $1.45 $11.98
Lumens 400 lm 420 lm 765 lm
Efficiency[?] 67 lm/W 64 lm/W 14 lm/W
Lumens/Purchase Price 27 lm/$ 28 lm/$ 170 lm/$
Power Factor[?] N/A 0.49 1
Color [?] Warm White, 4000K White, 4126K Warm White, 3015K
Angle[?] 100° 101° 45°
Dimmable Not Dimmable N/A Yes, Trailing Edge
CRI (Color Accuracy)[?] 80 82
Life 25,000 hours Not Measured 6,000 hours
Min/Max Voltage N/A / 12V N/A
Min/Max Temperature N/A / N/A N/A
Measured Temperature 77°C @ 25°C ambient
171°F @ 77°F ambient
256°C @ 25°C ambient
493°F @ 77°F ambient
Flicker Percent[?] 9% 3%
Flicker Index[?] 0.004 0.008


Link to manufacturer specifications at time of testing



Distribution Graph

Angle: 101° (±50.5° 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: 9%, Index: 0.004 (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]


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.