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Renewable Energy

Endurance test IPLED SMD120CM-15W-PW

Posted by Marcel van der Steen in Endurance Test, Led lights Add comments

ip_t8_smd IPLED presents a 120 cm long ledtube, equipped with 240 leds.

This lamp has been measured at zero hours (new state) before it went into the endurance test.

This article presents the endurance test results.

Samenvatting meetgegevens

parameter initially after endurance remarks
Color Temperature 5890 K 5810 K Cold white
Luminous Intensity Iv 496 Cd 452 Cd Went up at beginning and then down
Beam Angle 121 deg 122 deg Almost no variation.
Power P 14.8 W 14.6 W Almost no variation
Power Factor 0.87 0.87 No variation.
Luminous Flux 1527 lm 1420 lm
Luminous Efficacy 103 lm/W 97 lm/W
CRI_Ra 72 70
Coordinates Chromaticity Diagram x=0.3234 and y=0.3494 x=0.3250 and y=0.3560
Measurement Report (PDF) olino-pdf

Test duration and test environment

The lamp went into endurance test on 17 Oct 2009 and the test lasted until 29 June 2010.

During this period of time the lamp has seen the following ambient temperature and ambient relative humidity (T and RH measurements were only started from Jan 2010).

screen-shot-2010-08-12-at-233736

Period 10 Jan 2010 – 3 May 2010

14mei2010-24juni2010

Period 14 May 2010 – 24 June 2010

The ambient temperature close to the lamp varied between 9 – 33 deg C and the relative humidity between 25 – 58 %.

Variation of lamp parameters

ipled120cm_verloop

The variation of the lamp parameters during the endurance test.

See the explanation on the OliNo site for more on the test method.

An extrapolation is done to get to the 70 % illuminance value. The illuminance value straight underneath the lamp is expected to be the good indicator of the total luminous flux. When this illuminance drops with 30 % then the luminous flux is expected to drop as well with 30 %. The assumption is here that the beam anlge and the radiation diagram remains the same. This has been checked, see also the initial table.

ipled_120cm_extrapolatie

Extrapolation of the illuminance.

See the explanation on the OliNo site for more explanation and the link to the ASSIST document for the method of extrapolation.

The result is 15,000 hours before the L70 is reached.

Color change

The color change (change in color coordinates) is measured during the test period.

ipled120cm_chromaticity

Change in color coordinates during the endurance test.

The color coordinates indicated with the red cross-hairs are the coordinates after 1000 burn hours. These are taken as reference. All measured color coordinates fall well within the 4 step Mac Adams ellipse.

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