E14-C 4W LED Review

General Information

ID #32
SKU MAS100454641
Series N/A
Manufacturer Mort Bay (other LEDs from Mort Bay)
Fitting Type E14 (other E14 LEDs)
Light Type Globe
Height 103mm
Width 35mm
Weight 36g
Warranty N/A
Test Date 2013-03-15
Review Notes Surprisingly good CRI and reasonable efficiency.
Model Number: 12744
Price $14.98 (AUD) from Big W on 31st of January 2013


LED Specifications

Claimed Measured Compared To
Watts 4W 3.3W @ 245V 41.1W @ 246V
Yearly Running Cost[?] $0.88 $0.72 $9.00
Lumens 250 lm 246 lm 430 lm
Efficiency[?] 63 lm/W 75 lm/W 10 lm/W
Lumens/Purchase Price 17 lm/$ 16 lm/$ 215 lm/$
Power Factor[?] N/A 0.23 1
Color [?] Warm White, 3000K Warm White, 2928K Warm White, 2649K
Angle[?] Omni-Directional 139° 292°
Dimmable Not Dimmable N/A Yes, Leading or Trailing Edge
CRI (Color Accuracy)[?] N/A 88
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 75°C @ 25°C ambient
167°F @ 77°F ambient
134°C @ 25°C ambient
273°F @ 77°F ambient
Flicker Percent[?] 81% 15%
Flicker Index[?] 0.247 0.044


Link to manufacturer specifications at time of testing



Distribution Graph

Angle: 139° (±69.5° 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: 81%, Index: 0.247 (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.