FAQ Indoor

Our downlight and troffer products are attached directly to earth ground at installation. Our lamp products are not.

Fire Rating depends on the housing, and currently none of our housings are fire rated. Our downlight products are designed for fire rated housings.

Some of our downlight products are compatible with shallow housings.  Please refer to the Recommended Housing List for the specific product.

Our products are designed to be easy to install with no special tools or experience needed, using conventional dimmers and wiring. Please reference our installation information for detailed documentation.

We do not currently offer any plenum rated products.

TAA Compliant Products

TAA refers to the Trade Agreements Act (19 U.S.C. & 2501-2581), which is intended to foster fair and open international trade. TAA requires that the U.S. Government may acquire only “US-made or designated country end products." 

This act requires that contractors must certify that each end product meets the applicable requirements. End products are "those articles, materials and supplies to be acquired for public use.” This includes items which have been “substantially transformed” in the U.S.

Cree’s TAA compliant products are manufactured and/or assembled in the U.S. and are approved to be acquired by the U.S. Government for use. These products are also compliant with GSA Schedules.

The following products are only TAA compliant when the designation -US is included in the ordering number, which specifies that the product is "U.S. Manufactured."

LR6^TM Family: LR6 LR6-DR650  LR6-DR1000 LR6-277V LR6-DR1000-277V 

LE6 

Architectural Troffers - CR Series: CR24 CR22 CR14

2' x 2' Architectural Lay-ins - LR24^TM Family: LR24-32SKA35  LR24-38SKA35  

Our products meet California and Washington state Title 24 requirements.

If the CFL housing is pin-based with an integral housing, then no.  If the CFL housing is an incandescent housing with a CFL installed in it, then refer to the Recommended Housing List for compatibility.

Painting, staining, or otherwise altering our products voids the warranty.  The surfaces of the products themselves should not be painted, as they act as heat radiators and painting can reduce the products' ability to dissipate heat.

Although Cree LED Lighting Products run at much lower current levels than typical lighting, wiring size is determined by local code requirements and by the NEC.

Our lamps are designed for open air and semi-enclosed housings, but not recommended for fully enclosed housings.

Refer to the Product Spec Sheet or Installation Instructions for the specific products.

Both RC6 and H6 are recessed housings for new construction designed to accommodate all Cree 6-inch downlights. RC6 is designed for Edison sockets and GU24 sockets (Title-24 Applications). However, H6 is designed for 277V connectors. It’s also the only housing our LR6-277V will go into.

We do not currently offer downlight products designed for sloped ceilings, however our lamp product family is compatible with most sloped ceiling housings.

No. All of our current products are designed to maintain light color consistent through the dimming range.

The airtightness is dependent on the housing, and not the lighting fixture installed in it.

Compatibility was determined based on whether the LBR30 / LRP38 lamp would fit within the identified can when appropriately modified. The LBR30 / LRP38 lamp is designed for new construction and retrofit, both lamps simply screw into new or existing recessed housings or track fixtures for easy installation. However, we still suggest that you fit test when you design for our LBR30 and LRP38 lamps to be certain. Also please note that in any install, the installer should make sure that the LBR30 / LRP38 lamp is securely retained in the housing at the time of install.

The downlight and troffer families of products are designed to be mounted vertically, either straight up or straight down. The lamp family of products can be mounted in any orientation.

When dimming Cree LED Lighting products, power vs. light output are not linear.  Efficacy is reduced as the light is dimmed, meaning Lumens Per Watt goes down approximately 30% from full brightness to the bottom of the dimming range.

The CR series of commercial troffers are the only product that have bi-level switching.

Our downlight products are rated for use in IC and airtight housings.

Our downlights are designed to deliver an optimal distribution of light that balances the amount of light delivered to the horizontal surfaces and vertical surfaces. The distribution is more sophisticated than what may be defined by a simple beam angle. It is a general illuminator that delivers an optimal amount of light when utilized on typical downlight spacing.

Each of our product families are carefully evaluated for compatibility with a variety of dimming controls. The following link will take you to a list of dimmers recommended by Cree :  Recommended Dimmers.

Cree LED Lighting products provide high light quality (>90 CRI), long life (L70 >50,000 hours), high efficacy (up to 100 Lumens Per Watt), produce very little heat, and require virtually no maintenance. Neither incandescent nor CFLs can provide all of those features.

The LR24 troffer is designed to be used with “Low Voltage” or “0-10V DC control” type dimmers. These are dimmers that are NOT connected in line with the power supplying the light to be dimmed. Basically, they have two separated wiring group. One pair of wires goes to the dimming module connections on a light fixture (LR24 troffer) or dimming ballast. The other pair of wires goes to power packs for power supply control. The power pack provides both the 24 V power supply to operate dimmers as well as the 20 A line voltage relay to control the load in one compact housing.

Why Does Thermal Management Matter?
[Source: DOE http://www.netl.doe.gov/ssl/general_illumination_thermal_matter.htm]

This is due to inrush current and the capability of inverter based systems to handle it.

No. LR6-277V only works with H6-277V.

Please refer to the Recommended Dimmer List for dimmers tested with our products and recommended for use with our products.

Generally yes, as long as the other lighting product does not cause excessive line noise.  When dimming it is not recommended to put Cree Lighting Products on the same dimming circuit as other light sources, with the exception of an incandescent light.