Can you supply an IESNA LM-79 test report from an independent 3rd party laboratory?
Yes the LM-79 Data was performed by LTL (Luminaire Testing Laboratory) a member of IESNA and has been verified by Lighting Facts of which we are a member.
Is financing available from MSiSSL?
Yes, MSI has in-house financing options up to 100% of the purchase price.
Are there any Rebates available for your products?
The number of states that offer LED lighting rebates changes often, it is best to call MSI to get details for each state. 888 - 778 - 9864
Are your products DOE Energy Star products.
The final draft of the requirement for Self Ballasted lamps was released on 12/3/2010. We will be filing for Energy Star in the next 4 to 6 weeks
Which LED supplier did you choose and why?
The LED's Used in the MSI iPAR38 bulb are CREE XPE. CREE is currently the leader in the Power LED market and has been a value partner to MSI for the past 5 years. References for Cree can be found at www.CREE.com
What is the industry standard for A/C energy saved per watt of light energy saved?
1 to 3 ratio is the "industry standard".
Recent validated testing has conclusively proven that for every 1 watt of light energy saved, a ½ watt of secondary air conditioning savings is also achieved.
Note: It was originally expected that for every 1 watt of light energy saved, a 1/3 of a watt of secondary air conditioning savings would be achieved. However, based on results and observations from large volume retail installations in the states of Massachusetts and Florida, we have observed that for every 1 watt of light energy savings, one can expect half a watt of secondary air conditioning savings. As this data is specific to certain customers, we are unable to publish it. However, with an NDA we could discuss and share our findings.
What is Powerband Technology
Powerband is an exclusive patented technology that allows MSI's iPAR bulbs to adjust the power setting per bulb from 10, 12 or 16 watts.
What does the i in iPAR stand for?
The 'i" stands for intelligent each bulb has built in technology that allows the bulb to regulate and adapt to the power requirements, the bulb also stores information about the bulb, the power setting, the total hours, the manufacture date and with the MSI reader you can point the reader at the bulb and read these settings.
Have the MSI iPAR's been independently tested?
Are your iPAR bulbs UL certified?
Are your fixtures lead and mercury free?
Yes, our iPAR fixtures are manufactured to RoHS standards, the certificate of compliance is available upon request.
What is the Power Factor of your fixture?
How much power does it consume in the "off" state?
In summary of the current LTL reports the power factor of the MSI iPAR38 is as follows:
Does the color of the light output vary from fixture to fixture or in different spatial locations for a single fixture?
MSI uses the tightest binning criteria as well as a cross-bin placement system when manufacturing the iPAR38. This as well as color testing on every bulb that is produced will ensure color consistency from bulb to bulb.
Please note the graph below indicating the yield on the last production run.
Is the chromaticity of the fixture in the ANSI C78.377A color space and is it stable over time? How do you know?
As defined in the Department of Energy Draft 3 September 18, 2009 of the energy star eligibility criteria for Integral LED lamps the change of chromaticity over the minimum lumen maintenance test shall be within 0.007 on the CIE 1976 (u',v') diagram shown below.
The reason for using the CIE 1976 (u', v') diagram versus the CIE1931 (x', y') diagram is to assist with uniform plotting of the data. On the CIE1976 diagram the McAdams ellipses becomes a circle and 0.004 (u', v') creates a 4 step McAdam circle and 0.007 (u', v') creates a 7 step McAdams circle as can be seen on the graphs below. It can thus be said that 0.001 on the CIE1976 is equal to 1 step.
The graphs below shows chromaticity shift projection over the L70 life based on current data using thermals and drive current as tested on the iPAR38 running at 12W.
The graphs below shows chromaticity shift projection over the L70 life based on current data using thermals and drive current as tested on the iPAR38 running at 16W.
Base on the L70 chromaticity shift prediction, the projected shift in Color Corrected Temperature will be less than 100 CCT or 1 seven-step McAdams ellipse from point of origin.
What are the delivered lumens and LPW of the fixture?
In summary of the current LTL reports using a P4 flux bin led the efficacy values are as follows:
What is the operating temperature range specification
and what is the maximum junction temperature (Tj) of the LED lamps over that operating range?
MSI has performed complete thermal analysis on all of its products both at ambient temperature as well as in situe for a variety of standard as well as IC fixtures. We have also had independent testing performed by CREE ensuring that the junction temperature of the led is maintained at the recommended levels. The tabulated data below is an overview of the operational thermals of the iPAR38 in worst-case fixtures.
Do you have an IESNA LM-80 test report?
Yes, MSI has complete LM80 data on all of its products.
Dimmers, do you work with analog and electronic dimmers?
Though "the iPAR-38 (can) dim throughout the power range with virtually any dimmer on the market today," is there a preference between analog or electronic dimmers?
The iPAR38 is agnostic to dimmer type because it relies on the measurement of phase duration and period of the sine wave to calculate the phase angle and the corresponding dimming angle.
Leading edge dimmers are based on triac technology that relies on zero crosses of the line for proper operation. In certain infrastructures this type of dimmers that modulate the phase of the power source, can result in high current harmonics inducing voltage harmonic distortion thus leading to dimming-control malfunction. Through experimentation, it is shown that control systems based on the detection of zero-crossing may not function correctly when high current harmonics are present in the circuit. This behavior can be seen in both incandescent and LED lamps but may be more perceivable in LED lamps. See attached IEEE document for a technical explanation of this occurrence.
The dimmable iPAR38 family of products uses a technique to identify the double firing that occurs in such infrastructures and extract the correct phase information from the line. This ensures that the lamp does not flicker even in these unfriendly environments.
That said, it is always more preferable to use Electronic Dimmers (ELV Dimmers or Trailing Edge Dimmers) to control lighting in general. Trailing edge dimmers do not produce the high line harmonics that leading edge dimmers do which means that the wiring in the installation is not emitting spurious noise.
How doe the current vary as the voltage power supply varies between 85 and 256 volts?
and how does the current variation affect heat and lamp life?
While the power supply in the lamps was originally capable of universal voltage, the new models will be 85-135VAC (Dimmable and Non Dimmable),195-255VAC (Dimmable) and 195-305VAC (Non Dimmable).
We have decided to split the products into Low and High Voltage lines for the following reasons: • Ability to improve efficiency by fine tuning EMI filters to the current levels that they are working at. • Ability to reduce the cost of the components by choosing parts with voltage ratings based on the voltage rating of the final product. • Ability to increase speed of compliancy testing to meet various standards for safety and immunity – such as UL, FCC, CE etc.
Both the dimmable and the non-dimmable power supplies are designed to deliver constant power to the LEDs at similar efficiencies. The delivered power to the LEDs or the efficiency of the supply does not change with varying input voltage. This means that a system will draw about half the current at 220VAC as it would draw at 110VAC.
Are testing results available which substantiate the 50,000 rated life?
Working in conjunction with CREE we have calculated the L70 performance of the iPAR38 to far exceed 50000 hours at any of the 3 power levels. The information below is an explanation of how this was calculated.
As defined in the Department of Energy Draft 3 September 18, 2009 of the energy star eligibility criteria for Integral LED lamps the lumen maintenance must exceed 70% (L70) at 25000 hours of operation. The L70 curve must be based on 6000hrs of LM80-08 data at elevated temperatures of 45˚C and 85˚C and maintain a minimum flux of 91.8%. Attached is the LM80-08 data for 700mA drive current as supplied by CREE. File: (LM-80 XPE data for MSI.XLS)
The graphs below shows lumen maintenance projection based on the DOE IESNA LM80-08 ASSIST procedure using thermals and drive current as tested on the iPAR38 running at 12W.
DOE IESNA LM80-08 ASSIST procedure using thermals and drive current as tested on the iPAR38 running at 16W.
The graph below is based on actual long term data applied to the L70 curve using the ASSIST method. The IESNA SSL committee is now working to develop an accurate algorithm for modeling long-term lamp behavior.
Based on internal long-term reliability testing, C
Cree projects that white XLamp XP-E LEDs will deliver median 70% lumen maintenance after 50,000 hours of operation at a forward current of 700 mA. This projection is based on constant current operation with junction temperature maintained at or below 135°C and ambient air temperature maintained at or below 25°C.
The graphs below shows lumen maintenance projection based on actual data and the Cree "best fit" algorithm applied to the L70 curve using thermals and drive current as tested on the iPAR38 running at 12W.
The graphs below shows lumen maintenance projection based on actual data and the Cree "best fit" algorithm applied to the L70 curve using thermals and drive current as tested on the iPAR38 running at 16W.