12W COB WW Bulb Review
General Information
| ID | #191 |
|---|---|
| SKU | N/A |
| Series | N/A |
| Manufacturer | Ebay seller: 24hrseclub (other LEDs from Ebay seller: 24hrseclub) |
| Fitting Type | GU10 (other GU10 LEDs) |
| Light Type | Downlight (PAR) |
| Height | 105mm |
| Diameter | PAR16 (50mm) |
| Weight | 124g |
| Warranty | N/A |
| Test Date | 2013-08-06 |
| Review Notes | Claimed light source: 18 individual LEDs. Which is obviously not true as it a single COB LED. Claimed angle is way out, as is the colour and lumens. Power factor and CRI are poor. Packing and labelling is very poor. Warranty period is just 14 days. Nevertheless this is one of the brightest GU10 lights available. |
| Price | $7.99 (AUD) from Ebay on 23rd of July 2013 |
| Rating |   |
|---|
LED Specifications
| Claimed | Measured |
Compared To |
|
|---|---|---|---|
| Watts | 12W | 10.9W @ 246V | 50.2W @ 242V |
| Yearly Running Cost[?] | $2.63 | $2.39 | $10.99 |
| Lumens | 900 lm | 632 lm | 498 lm |
| Efficiency[?] | 75 lm/W | 58 lm/W | 10 lm/W |
| Lumens/Purchase Price | 113 lm/$ | 79 lm/$ | 144 lm/$ |
| Power Factor[?] | N/A | 0.54 | 1 |
| Color [?] | Warm White, 3600K | Warm White, 2940K | Warm White, 2737K |
| Angle[?] | 120° | 35° | 33° |
| Dimmable | Not Dimmable | N/A | Yes, Leading or Trailing Edge |
| CRI (Color Accuracy)[?] | N/A | 68 | |
| Life | 3,000 hours | Not Measured | 2,000 hours |
| Min/Max Voltage | 85V / 265V | 220V / 240V | |
| Min/Max Temperature | N/A / N/A | N/A | |
| Measured Temperature | 75°C @ 25°C ambient 167°F @ 77°F ambient |
192°C @ 25°C ambient 378°F @ 77°F ambient |
|
| Flicker Percent[?] | 2% | 9% | |
| Flicker Index[?] | 0.002 | 0.029 |
Link to manufacturer specifications at time of testing
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Distribution Graph
Angle: 35° (±17.5° 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
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: 0.002 (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.