D900 Classic 55 Review

General Information

ID #209
SKU BG-CR-D900-55-W
Series D900
Manufacturer Brightgreen (other LEDs from Brightgreen)
Fitting Type Kit (other Kit LEDs)
Light Type Downlight (PAR)
Height 100mm
Diameter PAR35 (110mm)
Weight 444g
Warranty 5 Years
Test Date 2013-10-10
Review Notes Also known as the D900 Curve. This is the 55 degree variant of the 45 degree D900 Classic tested here. Runs cool, has a good CRI value and power factor. Long warranty and long claimed lifespan. It is also the most expensive LED we have tested. There is a small 100hz variation in the lights output, but not enough that it should be noticeable to the human eye.
Price $99 (AUD) from Lighting Matters on 9th of October 2013


LED Specifications

Claimed Measured Compared To
Watts 15.7W 15.7W @ 244V
LED Driver Transformer
54.7W @ 12V
Yearly Running Cost[?] $3.44 $3.44 $11.98
Lumens 903 lm 909 lm 765 lm
Efficiency[?] 58 lm/W 58 lm/W 14 lm/W
Lumens/Purchase Price 9 lm/$ 9 lm/$ 170 lm/$
Power Factor[?] N/A 0.89 1
Color [?] Warm White, 3000K Warm White, 2939K Warm White, 3015K
Angle[?] 55° 51° 45°
Dimmable Yes, Leading or Trailing Edge Fair Yes, Trailing Edge
CRI (Color Accuracy)[?] 95 92
Life 70,000 hours Not Measured 6,000 hours
Min/Max Voltage 220V / 240V N/A
Min/Max Temperature -30°C / 81°C 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[?] 36% 3%
Flicker Index[?] 0.106 0.008


Link to manufacturer specifications at time of testing


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: 51° (±25.5° 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: 36%, Index: 0.106 (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
D900 Classic 45 $99 (AUD) 15.7W 841lm 59lm/W Warm White, 2953K 44° Kit
D900 Classic 55 $99 (AUD) 15.7W 909lm 58lm/W Warm White, 2939K 51° Kit


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.