13W LED COB Dimmable Downlight Kit Review

General Information

ID #156
Series N/A
Manufacturer Ebay seller: bestlightings (other LEDs from Ebay seller: bestlightings)
Fitting Type Kit (other Kit LEDs)
Light Type Downlight (PAR)
Height 115mm
Diameter PAR28 (90mm)
Weight 357g
Warranty 3 Years
Test Date 2013-06-24
Review Notes Ebay seller claimed light source was Cree LED chips. But after we contacted Cree, they confirmed that is was counterfeit. Price includes LED driver, Starwell model PE296B1435. Mains plug not included. Light fixture was labelled cool white, but was warm white. The on paper specs looked great. But it was too good to be true. CRI was poor. Efficiency was poor. Measured lumens was less than half what was claimed. A disappointing result.
Price $39.88 (AUD) from EBay seller bestlightings on 20th of June 2013


LED Specifications

Claimed Measured Compared To
Watts 13W 14.2W @ 245V
LED Driver Transformer
54.7W @ 12V
Yearly Running Cost[?] $2.85 $3.11 $11.98
Lumens 1040 lm 447 lm 765 lm
Efficiency[?] 80 lm/W 31 lm/W 14 lm/W
Lumens/Purchase Price 26 lm/$ 11 lm/$ 170 lm/$
Power Factor[?] N/A 0.95 1
Color [?] Warm White, 3000K Warm White, 3173K Warm White, 3015K
Angle[?] 110° 69° 45°
Dimmable Yes, Leading or Trailing Edge Fair Yes, Trailing Edge
CRI (Color Accuracy)[?] 80 62
Life 50,000 hours Not Measured 6,000 hours
Min/Max Voltage 200V / 250V N/A
Min/Max Temperature N/A / N/A N/A
Measured Temperature 58°C @ 25°C ambient
136°F @ 77°F ambient
256°C @ 25°C ambient
493°F @ 77°F ambient
Flicker Percent[?] 2% 3%
Flicker Index[?] 0.007 0.008


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: 69° (±34.5° 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: 2%, Index: 0.007 (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.