LED WASHGRAZE Frequently Asked Questions
| Q. What is your warranty policy? | |
| A. Our products are warranted against defects of manufacture for 3 years from date of purchase, providing they have been subjected to normal use and service. Any replacement will be made at no charge except for necessary shipping charges. Our products are currently not field serviceable. Opening the fixture will void the product's warranty. | |
| Q. What power supplies are compatible with your LED WashGraze? | |
| A. The LED WashGraze uses "Class 2" 24 VDC power supplies. Click here to view our recommended power supplies. | |
| Q. If a WashGraze system is installed on a building and 24 months later, one of the arrays or fixtures fails, how do you make sure that the replacement is not brighter or somehow different than the fixtures still installed and working on the building? | |
| A. Please send the failed unit to DDP for evaluation so we can determine if the unit needs to be replaced or repaired. If the unit is not repairable, we will ask you to send a working unit so we can match light output with replacement part. | |
| Q. How do you keep record of stock and production dates to address binning and light output mismatches on any future replacement part? | |
| A. We mark each fixture with a job number and date codes. These codes allow us to provide proper color and light output selection for future replacement fixtures. | |
| Q. Is your LED WashGraze compatible with standard dimming controls? | |
| A. The LED WashGraze accepts 0-10V signal for dimming. Three sets of wires are allocated for dimming function. Please click here to view recommended dimmers and here for dimming installation. Note that some TRIAC dimmers are not compatible with the LED WashGraze product. | |
| Q. How far away can you install the power supplies from fixture without experiencing voltage drop? | |
| A. Standard length is from 6ft to a maximum of 10ft. | |
| Q. How far away can the AC source be from the power supply? | |
| A. There is no limitation on cable length. Note that it is the customer's responsibility to comply with existing electrical city codes when installing our fixture. | |
| Q. Can I use a single dimmer to control the light output of several units connected to individual power supplies? | |
| A. Yes. A single dimmer can control a maximum of 10 ft fixtures connected to individual power supplies. Parallel connection of dimming cables can be done using terminal blocks. Contact factory for assistance for installation set-ups not currently illustrated in our wiring and operations manual. | |
| Q. How many fixtures can you cascade in a single power supply? | |
| A. You can cascade up to 4ft on a 17W version and 8ft on a 8W version. Please refer to page 2 of the LED WashGraze Instruction Manual to determine required power supply wattage. | |
| Q. Do we need junction boxes or wet dry enclosures when installing power supplies? | |
| A. Power supplies may be installed outdoors without using wet-dry enclosures if the units are rated for wet-dry environments. Please click here to view our list of recommended power supplies. | |
| Q. Can you offer a turn-key product, where the fixture, power supply, cabling and j-boxes are all included? How much would that add to the pricing? | |
| A. Yes we can offer a turn-key product solution. Please ask our Sales Reps to provide a complete lighting package when quoting for a project. The lighting package will include the fixtures, power supplies, cables and wet-dry enclosures (if required). Pricing will need to be determined depending on the size of the project. | |
| Q. Can you install power supplies in parallel? | |
| A. No. There is a 4 amp limitation on Class 2 rated power supplies. Parallel installation will increase the total load on the cables. | |
| Q. What is the total luminaire efficacy of the LED WashGraze? | |
| A. The LED WashGraze have a nominal delivered light output of 830 lumens per foot (cool white) and input of 21 Watts for a delivered efficacy of greater than 40 lumens per watt. Please refer to our IES files online. | |
| Q. Is the LED WashGraze Energy Star Compliant? | |
| A. Energy Star just released Category A additions covering standards for Wall Washer. This will take effect in September 2008. We will submit our products as soon as standards are in place. | |
| Q. Is the LED WashGraze UL Listed? | |
| A. Yes. We have a wet-dry UL Listing and an IP66 rating. | |
| Q. Is the LED WashGraze difficult to install? | |
| A. No, the LED WashGraze is easy to install. Please reference our installation information for detailed documentation. We can also provide engineering assistance for other wiring set-ups not currently mentioned in our installation manual. | |
| Q. What is the minimum and maximum operating temperature for the LED WashGraze? | |
| A. The minimum operating temperature for the LED WashGraze is at -22 Fahrenheit and maximum operating temperature at 122 Fahrenheit. | |
| Q. Does the LED WashGraze have a damp or wet rating? | |
| A.The LED WashGraze is UL rated for wet dry application and an IP66 rating. We expect to have an IP67 rating or better in the future for installation where the fixture will sit under water. | |
| Q. Do you offer fixtures with directional lighting? | |
| A. The LED WashGraze is offered in 7 different beam angles. One of them is an assymetric angle that directs the light 20 degrees off center. The assymetric angle uses a directional turning film that can be added to our fixture using one of the standard beam angles. | |
| Q. Does the LED WashGraze meet California's Title – 24 for efficacy? | |
| A. Yes, the LED WashGRaze exceeds California's Title – 24 for high efficacy luminaires. | |
| Q. How did you test for CRI, color temperatures, and photometry? | |
| A. We measured the CRI and color temperature in our photometry lab and validated our data with tests performed at an independent testing lab (Lighting Sciences ). | |
| Q. Will your .ies files provide accurate foot candle levels for this fixture? | |
| A. IES files posted on our website are based on photometric testing conducted by Lighting Sciences Inc. in accordance with LM-79 IES procedures. | |
| Q. How do I know if I can use the LED WashGraze for our lighting project? | |
| A. Please reference our installation information and IES files when designing your application and light output compatibility matrix. | |
| Q. How do I calculate total power supply requirements? | |
A. When selecting the proper 24 VDC “Class 2” Power Supplies, it is important to use the 24 VDC power supply with extra wattage rating to ensure the fixtures' optimum performance. You need to add 40% to the actual power consumption of the fixture to compensate peak current of the LED Wash Graze's internal electronics. |
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| Q. What is the total power consumption of each LED WashGraze fixture? | |
| A. The LED WashGraze is offered in two wattage versions, the 17W uses 24W while the 8W version is counted as 12W. | |
| Q. Can you extend the cabling between the LED WashGraze and the power supply? | |
| A. No. You should not extend the cable assembly provided in your lighting package as this will result in voltage drop and will void the product's warranty. | |
| Q. Can I use my own mounting fixtures to install the LED WashGraze? | |
| A. No. Our mounting brackets were submitted to UL for safety test. We are not liable for any faulty installation as a result of using mounting brackets not provided in your lighting package. | |
| Q. Will the product still be UL listed if I opt for custom part e.g. custom connector? | |
| A. Any custom part selected with a part number code starting with "C" are not covered in our UL listing. Customized fixtures and accessories will need to be relisted. Contact factory for futher information. | |
| Q. What is your tolerance level for the LED WashGraze color temperature options? | |
| A. The variation of chromaticity in different directions shall be within a +/- 200 range. | |
| Q. What is the CRI of your LED WashGraze? | |
| A. Our LED WashGraze has a CRI of 80 for warm white and 75 for cool white. | |
| Q. Do you test each LED WashGraze before it is shipped? | |
| A. Yes, we test each LED WashGraze individually and tune them to the optimal color point before shipment. |
