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Cree LMH2 LED Module Versus Traditional CFL Options



The Cree LMH2 LED Module provides unparalleled efficacy and light quality in a fully integrated module. Utilizing Cree’s True White Technology, the LMH2 provides beautiful 90 plus CRI lights in 4000 Kelvin, 3500 Kelvin, 3000 Kelvin, and 2700 Kelvin color temperatures. In addition, the LMH2 delivers 97 LPW efficacy across all CCT and lumen options. There are two lens options. The flat lens provides an 82 Degree Beam Angle while the Dome lens provides a 100 Degree Beam Angle. In addition, there is a Unique Driver Compatibility Program that provides a list of tested and recommended drivers for the LMH2. There is also a 5-year warranty on the module, even for those utilizing a third party driver. Finally, the aluminum housing provides tremendous thermal design flexibility.


Figure 1: Flat and dome lens examples. 

In Figure 2 below are more details on the LMH2 Optic options. The flat lens has an 82 Degree Angle, Full Width Half Max, and provides more directional light. This makes it ideal for down lights.

In comparison, the dome lens has a 100 Degree Angle, Full Width Half Max, and provides more light directed sideways. This makes it ideal for reflectors or non-directional lighting.


Figure 2: Flat lens vs dome lens optic angles. 

Shown in Figure 3 is a design example comparing a 26 Watt CFL source to a 1250 lumen LMH2. As seen in the chart, the LMH2-based design provides the same amount of lumens as the incumbent solution, but much more efficiently. The LMH2 has an efficacy of 73 lumens per watt, while the CFL solution is at only 40 lumens per watt. In addition, the LMH2 has five times the projected lifetime of the CFL source. There are additional benefits to the LMH2 including better color performance, faster startup, and better dimming capabilities.


Figure 3: LMH2 version vs 26 W CFL comparison breakdown. 

The design example in Figure 4 compares a fixture utilizing two 32 Watt CFLs to a fixture utilizing a 3000 lumen LMH2. As seen in the chart, the LMH2-based design provides significantly more lumens than the incumbent solution. The LMH2 has an efficacy of 72 lumens per watt, which is twice the efficacy of the CFL. It also provides the same light intensity with 50% of the power. As in the previous example, there are additional benefits to the LMH2 including better color performance, faster startup, and better dimming capabilities, along with five times greater projected lifetime than the incumbent solution.


Figure 4: LMH2 version vs 32 W CFL comparison breakdown. 

Depicted in Figure 5 is a design example comparing a fixture utilizing a 39 Watt T6 CMH to a fixture utilizing both a 2000 lumen and 3000 lumen LMH2. As seen in the chart, the LMH2-based designs provide two different options. The 2000 lumens solution enables a solution with comparable light output to the incumbent solution. The 3000 lumen solution provides significantly more lumens and candela while still utilizing 20% less energy than the incumbent solution.


Figure 5: LMH2 version vs 39 W T6 CMH comparison breakdown. 

Here is an example, Figure 6, comparing an incumbent spot accent luminaire with a luminaire utilizing a 3000 lumen LMH2. The LMH2-based solution provides nearly three times as many lumens and seven times the efficacy. As mentioned previously, an LMH2-based solution provides a color performance comparable to halogen as well. Another design element to note is how much physically smaller the LMH2 track head is compared to the incumbent solution. This gives end users many more design options.


Figure 6: LMH2-3000 lumen vs incumbent spot accent. 

For those looking for help in implementating the LMH2 in their application, one of the resources available is a design guide with several design examples including mechanical, optical, and thermal considerations.

Figure 7 below shows a summary of LM-80 Data for the LMH2 LED module. With over 6000 hours of data collected, the calculated L70 lifetime for the LMH2 is 114,000 hours over 13 years of continuous operation.

Please see the notes on how this lifetime was calculated.


Figure 7: LM-80 data for the LMH2 LED module. 

In summary, the Cree LMH2 Module provides beautiful 90 CRI Plus Light paired with industry-leading efficacy of over 97 lumens per Watt across all CCT and Lumen Options. The LMH2 is available in Dome and Flat Lens Options, enabling different design options. LMH2 Module-based designs offer extensive advantages versus designs using incumbent light sources. Those advantages include better efficacy, lower wattage, more lumens, and longer lifetimes. Excellent LM-80 data is available for the LMH2 with calculated L70 projections for 100,000 hours over 13 years of continuous operation.

References:
  1. Full audio version of this training
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