|Manufacturer||Cree, Inc. (other LEDs from Cree, Inc.)|
|Fitting Type||E26 (other E26 LEDs)|
|Review Notes||Part of the True White product line. Bulb appears grey-blue when switched off due to neodymium oxide layer. No doubt this was done to filter some of the LED's yellow spectrum. Trading off some efficiency to gain CRI, in order to meet the California Energy Commission (CEC) LED bulb specification. Bulbs in this series have the highest measured CRI of the 120V LED globes tested here to date. CRI was found to vary across the angle of distribution from 93-95 CRI. Dimming profile was very linear, tested using a Lutron Skylark CTCL-153P CFL/LED dimmer. Emitting area has a rubberized coating for shatter resistance. Carries UL approval label.|
|Price||$13.97 (USD) from Home Depot on 29th of April 2014|
|Watts||8.5W||8.1W @ 122V||64.7W @ 246V|
|Yearly Running Cost[?]||$1.86||$1.77||$14.17|
|Lumens||450 lm||512 lm||811 lm|
|Efficiency[?]||53 lm/W||63 lm/W||13 lm/W|
|Lumens/Purchase Price||32 lm/$||37 lm/$||406 lm/$|
|Color [?]||Warm White, 2700K||Warm White, 2716K||Warm White, 2711K|
|Dimmable||Yes, Leading or Trailing Edge||Excellent||Yes, Trailing Edge|
|CRI (Color Accuracy)[?]||93||95|
|Life||25,000 hours||Not Measured||1,000 hours|
|Min/Max Voltage||N/A / 120V||240V / 240V|
|Min/Max Temperature||-25°C / 45°C||N/A|
|Measured Temperature||89°C @ 25°C ambient
192°F @ 77°F ambient
|158°C @ 25°C ambient
316°F @ 77°F ambient
Link to manufacturer specifications at time of testing
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.
Angle: 304° (±152° 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.
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.
Percent: 37%, Index: 0.11 (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]
|40W Replacement Soft White Dimmable||$14 (USD)||8.1W||512lm||53lm/W||Warm White, 2716K||304°||E26|
|60W Replacement Soft White Dimmable||$16 (USD)||12.5W||700lm||59lm/W||Warm White, 2685K||296°||E26|
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.