E27-A60 4W LED Review

General Information

ID #29
SKU MAS100456700
Series N/A
Manufacturer Mort Bay (other LEDs from Mort Bay)
Fitting Type E27 (other E27 LEDs)
Light Type Globe
Height 107mm
Width 60mm
Weight 44g
Warranty N/A
Test Date 2013-03-14
Review Notes non dimmable
Claimed 25W Incandescent Replacement
Model number: 12539
Price $14.98 (AUD) from Big W on 31st of January 2013


LED Specifications

Claimed Measured Compared To
Watts 4W 3.4W @ 246V 64.7W @ 246V
Yearly Running Cost[?] $0.88 $0.74 $14.17
Lumens 250 lm 256 lm 811 lm
Efficiency[?] 63 lm/W 75 lm/W 13 lm/W
Lumens/Purchase Price 17 lm/$ 17 lm/$ 406 lm/$
Power Factor[?] N/A 0.24 1
Color [?] Warm White, 3000K Warm White, 2920K Warm White, 2711K
Angle[?] Omni-Directional 84° Omni-Directional
Dimmable Not Dimmable N/A Yes, Trailing Edge
CRI (Color Accuracy)[?] N/A 89
Life 20,000 hours Not Measured 1,000 hours
Min/Max Voltage 220V / 240V 240V / 240V
Min/Max Temperature N/A / N/A N/A
Measured Temperature 74°C @ 25°C ambient
165°F @ 77°F ambient
158°C @ 25°C ambient
316°F @ 77°F ambient
Flicker Percent[?] 82% 11%
Flicker Index[?] 0.248 0.034


Link to manufacturer specifications at time of testing



Distribution Graph

Angle: 84° (±42° 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: 82%, Index: 0.248 (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.