5W GU10 CW Downlight Review

General Information

ID #115
Series N/A
Manufacturer iGlobe (other LEDs from iGlobe)
Fitting Type GU10 (other GU10 LEDs)
Light Type Downlight (PAR)
Height 60mm
Diameter PAR16 (50mm)
Warranty 5 Years
Test Date 2013-05-21
Review Notes Side of box indicates colour is 6000K (Warm). But this is a typo by iGlobe. This is one of the most efficient GU10 globes tested to date. No doubt helped by higher efficiency cool white LED chip. Power factor isn't so good. But running temperature is very reasonable. No diffuser is used, and a halo of brighter (blue-purple) light patches was observed at 20 degrees. Colour evenness was poor as a result (6194 - 7477K was measured)
Price $12.90 (AUD) from www.iGlobe.com.au on 29th of August 2013


LED Specifications

Claimed Measured Compared To
Watts 5W 4.3W @ 246V 50.2W @ 242V
Yearly Running Cost[?] $1.10 $0.94 $10.99
Lumens 410 lm 357 lm 498 lm
Efficiency[?] 82 lm/W 83 lm/W 10 lm/W
Lumens/Purchase Price 32 lm/$ 28 lm/$ 144 lm/$
Power Factor[?] N/A 0.55 1
Color [?] Cool White, 6000K Cool White, 6194K Warm White, 2737K
Angle[?] 90° 82° 33°
Dimmable Not Dimmable N/A Yes, Leading or Trailing Edge
CRI (Color Accuracy)[?] N/A 72
Life 50,000 hours Not Measured 2,000 hours
Min/Max Voltage 85V / 265V 220V / 240V
Min/Max Temperature N/A / 45°C N/A
Measured Temperature 53°C @ 25°C ambient
127°F @ 77°F ambient
192°C @ 25°C ambient
378°F @ 77°F ambient
Flicker Percent[?] 2% 9%
Flicker Index[?] 0.003 0.029


Link to manufacturer specifications at time of testing



Distribution Graph

Angle: 82° (±41° 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: 2%, Index: 0.003 (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.