75W Frosted Incandescent Review

General Information

ID #148
Series N/A
Manufacturer Mirabella (other LEDs from Mirabella)
Fitting Type B22 (other B22 LEDs)
Light Type Globe
Height 102mm
Width 58mm
Weight 36g
Warranty N/A
Test Date 2013-06-11
Review Notes This is not a LED globe. It is just included for comparison. Of interest is how the painted frosting on the globe reduces the light output compared to unfrosted globes. Resulting in a poor 11 lm/W efficiency.
Price $2 (AUD) on 11th of June 2013


LED Specifications

Claimed Measured Compared To
Watts 75W 73.3W @ 246V 64.7W @ 246V
Yearly Running Cost[?] $16.43 $16.05 $14.17
Lumens 1190 lm 799 lm 811 lm
Efficiency[?] 16 lm/W 11 lm/W 13 lm/W
Lumens/Purchase Price 595 lm/$ 400 lm/$ 406 lm/$
Power Factor[?] N/A 1 1
Color [?] Warm White Warm White, 2597K Warm White, 2711K
Angle[?] Omni-Directional Omni-Directional Omni-Directional
Dimmable Yes, Leading or Trailing Edge Good Yes, Trailing Edge
CRI (Color Accuracy)[?] 95 99
Life 750 hours Not Measured 1,000 hours
Min/Max Voltage 240V / 250V 240V / 240V
Min/Max Temperature N/A / N/A N/A
Measured Temperature 141°C @ 25°C ambient
286°F @ 77°F ambient
158°C @ 25°C ambient
316°F @ 77°F ambient
Flicker Percent[?] 8% 11%
Flicker Index[?] 0.026 0.034


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

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: 0.026 (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.