4W LED Fancy Round Lamp CW Review

General Information

ID #312
SKU AT9402/SBC/CW
Series AT9402
Manufacturer Atom Lighting (other LEDs from Atom Lighting)
Fitting Type B15 (other B15 LEDs)
Light Type Globe
Height 80mm
Width 45mm
Weight 42g
Warranty 3 Years
Test Date 2014-08-26
Review Notes A small globe for use with the less common small bayonet cap (B15) socket. Most smaller globes tend to be screw fittings. Has good efficiency, but isn't very bright due to the low wattage. Is around the same brightness as a 30W incandescent globe. Globe is not dimable. Power factor is pretty awful, but with the low wattage this is less critical. Box carries C-Tick and CE approval labels. There is some high frequency flicker (which won't be visible to most people). Exact pricing is not known at this time. Estimated $15.
Price $16 (AUD) from LED Lighting Designs on 28th of August 2014
Rating

 

LED Specifications

Claimed Measured Compared To
Watts 4W 3.4W @ 243V 41.1W @ 246V
Yearly Running Cost[?] $0.88 $0.74 $9.00
Lumens 280 lm 284 lm 430 lm
Efficiency[?] 70 lm/W 84 lm/W 10 lm/W
Lumens/Purchase Price 18 lm/$ 18 lm/$ 215 lm/$
Power Factor[?] N/A 0.34 1
Color [?] Warm White, 4000K Warm White, 3989K Warm White, 2649K
Angle[?] 220° 196° 292°
Dimmable Not Dimmable N/A Yes, Leading or Trailing Edge
CRI (Color Accuracy)[?] 80 80
Life 25,000 hours Not Measured 1,000 hours
Min/Max Voltage 220V / 240V 240V / 240V
Min/Max Temperature -20°C / 50°C N/A
Measured Temperature 64°C @ 25°C ambient
147°F @ 77°F ambient
134°C @ 25°C ambient
273°F @ 77°F ambient
Flicker Percent[?] 60% 15%
Flicker Index[?] 0.165 0.044

 

Link to manufacturer specifications at time of testing

 

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Distribution Graph

Angle: 196° (±98° 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: 60%, Index: 0.165 (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
4W LED Fancy Round Lamp CW $16 (AUD) 3.4W 284lm 70lm/W Warm White, 3989K 196° B15
4W LED Fancy Round Lamp WW $16 (AUD) 3.2W 244lm 69lm/W Warm White, 3059K 188° B22

 

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.