10W Sharp GU10 LED Spotlight Globe DW Dimmable Review

General Information

ID #178
Series LED Spotlight Globe
Manufacturer starlight (other LEDs from starlight)
Fitting Type GU10 (other GU10 LEDs)
Light Type Downlight (PAR)
Height 100mm
Diameter PAR16 (50mm)
Weight 148g
Warranty 2 Years
Test Date 2013-07-31
Review Notes Claimed light source: SHARP KG-5 LED chip, Claimed 50W halogen replacement. Heavy flickering using leading edge dimmer. Universal dimmer used for dimming test, but produced 20Hz flicker below 10% brightness. (Flicker might improve with additional load on circuit, but were only able to test with 1 sample). Brightest GU10 tested to date. Good efficiency. Acceptable CRI, PF & running temp. There is also a non dimmable version of the lamp, found here
Price $22.68 (AUD) from www.L-E-D.com.au on 25th of July 2013


LED Specifications

Claimed Measured Compared To
Watts 10W 8.9W @ 247V 50.2W @ 242V
Yearly Running Cost[?] $2.19 $1.95 $10.99
Lumens 800 lm 639 lm 498 lm
Efficiency[?] 80 lm/W 72 lm/W 10 lm/W
Lumens/Purchase Price 35 lm/$ 28 lm/$ 144 lm/$
Power Factor[?] N/A 0.74 1
Color [?] White, 5000K White, 4761K Warm White, 2737K
Angle[?] 60° 47° 33°
Dimmable Yes, Leading or Trailing Edge Good Yes, Leading or Trailing Edge
CRI (Color Accuracy)[?] 83 83
Life 40,000 hours Not Measured 2,000 hours
Min/Max Voltage N/A / N/A 220V / 240V
Min/Max Temperature N/A / N/A N/A
Measured Temperature 59°C @ 25°C ambient
138°F @ 77°F ambient
192°C @ 25°C ambient
378°F @ 77°F ambient
Flicker Percent[?] 8% 9%
Flicker Index[?] 0.021 0.029


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: 47° (±23.5° 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: 8%, Index: 0.021 (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
10W Sharp GU10 LED Spotlight Globe DW $22 (AUD) 8.9W 655lm 80lm/W White, 4756K 46° GU10
10W Sharp GU10 LED Spotlight Globe DW Dimmable $23 (AUD) 8.9W 639lm 80lm/W White, 4761K 47° GU10
10W Sharp GU10 LED Spotlight Globe WW $22 (AUD) 9W 535lm 72lm/W Warm White, 2974K 46° GU10


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.