G4 2W 2700K 220V to 12 Led Cob Lamp
G4 2W 2700K 220V to 12 Led Cob Lamp
G4 2W 2700K 220V to 12 Led Cob Lamp
G4 2W 2700K 220V to 12 Led Cob Lamp
G4 2W 2700K 220V to 12 Led Cob Lamp

G4 2W 2700K 220V to 12 Led Cob Lamp

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Product Overview

Description



LED Special Bulb


| RA≈85 |







DATESHEET
| Excellent Cost Performance |



|    ELECTRICAL DATE    |
Voltage ( V )
12V AC/DC
Power Factor ( λ )
0.7+
Starting Time ( Sec )
<0.5
Warm-up Time ( Sec )
Instant full light


|    PRODUCT DATE    |
Bulb Type
G4 Led Special Bulb
Lamp Base
G4
Product Wattage ( W )
2W
Equivalent Wattage ( W )
20W
Colour Temperature ( K )
2700K 
Colour Render Index ( Ra )
85°
Energy Label
A+
Operating Temperature 
-30°C to +40°C
Switching Cycles ( Times )
>1,000,000
Mercury Content ( mg )
N/A
Weight ( g )
20g


|    PERFORMANCE DATE    |
Total Luminous Flux ( lm )
190-200lm
Rated Life ( hrs )
15,000 Hours


|    DIMENSION   |
Diameter ( mm )
10.5mm
Length ( mm )
37.3mm





COLOUR Performance
Colour Temperature Optional
| 2700K |
High Colour Rending Index
RA≈85







Colour Temperature

The colour temperature of a light source is taken from the temperature of a perfect black-body radiator that radiates light of a similar appearance to that of the light source. It is measured in units of absolute temperature; Kelvin (K). Interestingly,
although red is associated with being a hot colour and blue a cold one, on the black body curve, blue occurs at higher
temperatures than red. A more visual example of this apparent colour temperature contradiction can be seen in candlelight, which emits a warm red orange glow, but in fact has a low Kelvin temperature of 1850K. Therefore higher colour temperatures (5000K more) are called cool colours (bluish white); lower colour temperatures (2700 – 3000K) are called warm colours (yellowish white to red).



Colour Rending Index
( CRI )

The Colour Rendering Index (CRI or Ra) is a quantitative measure, which rates a light source’s ability to reproduce the colours of objects faithfully. In order to objectively compare the colour rendering properties of any light source, the CIE’s standardised measuring method operates on a scale from 0 to 100 (poor to excellent). The colour change of 14 standard colours is calculated when an object is exposed to a specific light source and then this is compared to a reference illuminant of the same colour temperature (a black body* is used for colour temperatures up to 5000K and daylight above that). The CRI for a pair of light sources can only be compared if they have the same colour temperature. The CRI scale is chosen so that an ideal black body source, such as incandescent or halogen lamps, is by definition a CRI rating of 100. For light sources emitting a discrete spectrum, like LED and discharge lamps, the CRI can be anywhere between 0 - 100. As a rule of thumb, the more the spectrum is filled at all wavelengths (380–760nm), the better the colour rendering properties of the source, however a high CRI measurement intrinsically means lower efficacy (as less efficient wavelengths are also represented in the spectrum). * A black body is a theoretical object that absorbs all incident electromagnetic radiation and due to its ability to absorb at all wavelengths, is the best possible emitter of thermal radiation. It radiates a continuous spectrum that depends on the body's temperature.



Colour Consistency
( SDCM )

| SINCELIGHT SDCM<5 |

The key to creating an LED lighting scheme, that looks good for years to come is in ensuring that, over their lifespan, all of the lamps are performing within an acceptable tolerance in terms of colour deviation. To define ‘acceptable tolerance’ from lamp to lamp, LED manufacturers have adopted the MacAdam ellipse and SDCM (Standard Deviation of Colour Matching) measurement of colour consistency.

MacAdam Ellipse
The MacAdam ellipse is a system of colour measurement. It measures how much colour variation is possible around these axes, before
the human eye detects a colour change. A series of ellipses can then be drawn around any target colour, and the closer any given lamp is to the target, the less colour deviation will be experienced when these lamps are placed side by side in an installation.

The distance from the target point in each ellipse is measured in SDCM. An SDCM of 1 step means that there is no colour difference between LED chips, 2-3 SDCM means that there is hardly any visible colour difference. Colour consistency of 6-7 SDCM is accepted by the market and in line with the European EcoDesign – US Energy Star requirements.

SINCELIGHT® Performance
Thanks to SINCELIGHT®’s control of the phosphor/LED blend, SINCELIGHT® LED professional light sources have a colour consistency of 3-5 SDCM.


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