4W GU10 LED Downlight Review
General Information
| ID | #152 |
|---|---|
| SKU | KALED4WGU4A |
| Series | N/A |
| Manufacturer | Kogan (other LEDs from Kogan) |
| Fitting Type | GU10 (other GU10 LEDs) |
| Light Type | Downlight (PAR) |
| Height | 60mm |
| Diameter | PAR16 (50mm) |
| Weight | 51g |
| Warranty | 1 Years |
| Test Date | 2013-06-17 |
| Review Notes | For the price the light output was OK, but fell well short of their claims. CRI is bad, power factor is bad. So colours might look a little strange under this light. |
| Price | $6 (AUD) from Kogan on 16th of June 2013 |
| Rating |   |
|---|
LED Specifications
| Claimed | Measured |
Compared To |
|
|---|---|---|---|
| Watts | 4W | 4.6W @ 241V | 50.2W @ 242V |
| Yearly Running Cost[?] | $0.88 | $1.01 | $10.99 |
| Lumens | 400 lm | 244 lm | 498 lm |
| Efficiency[?] | 100 lm/W | 53 lm/W | 10 lm/W |
| Lumens/Purchase Price | 67 lm/$ | 41 lm/$ | 144 lm/$ |
| Power Factor[?] | N/A | 0.55 | 1 |
| Color [?] | Warm White, 3500K | Warm White, 3503K | Warm White, 2737K |
| Angle[?] | 30° | 24° | 33° |
| Dimmable | Not Dimmable | N/A | Yes, Leading or Trailing Edge |
| CRI (Color Accuracy)[?] | N/A | 66 | |
| Life | 50,000 hours | Not Measured | 2,000 hours |
| Min/Max Voltage | 100V / 240V | 220V / 240V | |
| Min/Max Temperature | N/A / N/A | N/A | |
| Measured Temperature | 61°C @ 25°C ambient 142°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
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Distribution Graph
Angle: 24° (±12° 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
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
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.