Golf Course Management

APR 2013

Golf Course Management magazine is dedicated to advancing the golf course superintendent profession and helping GCSAA members achieve career success.

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THE INSIDER: shop Scott R. Nesbitt Operators may improve their equipment's nighttime performance by installing light bulbs with different color temperatures. Photos by Scott Nesbitt Custom night lights Tinkering with the "color temperature" of equipment lighting can produce some real benefts for course work done before and after daylight hours. NEWS & notes The Textile Rental Services Association (TRSA) has released the results of a new scientific study assessing the health risks of laundered, reusable shop towels. The study was conducted by independent researcher ARCADIS for TRSA, the textile services industry advocate. The study's purpose was to quantify health impacts of these towels in commercial use settings. Specifically, the study examined possible risks associated with the use of laundered, reusable towels against acceptable federal environmental and health standards and is a direct response to allegations by the disposables industry. The independent ARCADIS study has been submitted for peer review for publication in industrial hygienic scholarly journals. For additional information and report results, go to www.trsa.org. 34 GCM April 2013 Color temperature is not the physical temperature of the lighted bulb, but the hue of the light produced by the bulb. When driving against traffc at night, you'll see some headlights that look yellow, white or annoyingly bright blue or violet. That's the eye's response to increasing color temperature. Color temperature is expressed in Kelvin (K) units, after British scientist William Kelvin. In the late 1800s, he developed colored light standards by recording the color change of a block of carbon as it was heated. The photo inset shows what colors correspond, roughly, to a bulb's K rating. Under the night sky, our perception of colors is altered. We can see farther and more clearly when we add artifcial light. The "strength" of this light is measured in lumens. But a 55-watt bulb producing 1,000 lumens of 3,700K light may give better night vision than a 70-watt bulb producing 1,250 lumens of 5,000K light. Here are some basics covering the standard halogen/xenon bulbs in the photo. Typical factory turf equipment headlights use a 12-volt, 55-watt bulb of about 3,000K hue. The bulb's base should be stamped with the voltage and watt rating, but not normally with the K rating or lumens. To get those specs, I've found the best source is online suppliers, such as those on eBay. I've seen no difference in longevity or performance between $10 bulbs from the auto parts store and $2 bulbs from online sources. Use a fne-tip marker to label the metal parts of new bulbs with their K rating. Halogen bulbs, like those in the photo, come in standard physical sizes (H1, H3, H7, etc.). Within each size, you'll fnd different voltage and wattage ratings. You can get more lumens of intensity by installing a 70- or 100-watt H3 bulb in place of an original 55-watt H3 bulb. But you may overload the wiring harness, blow fuses or melt the rubber and plastic parts in the lamp. Proceed with caution. A 12-volt, 20-amp fuse will handle 240 watts of power and is meant to protect the wiring harness, not the light bulb. Run heavier wiring if you settle on bulbs with higher wattage than the original equipment. Remember to keep your fngers off the quartz bulbs — the oil can cause a bulb to fracture. Wiping the bulb with rubbing alcohol just before installation is good practice. Be bold when experimenting and work with your equipment operators. You may fnd that adding supplemental "fog light" or "driving light" light fxtures, on separate switched circuits, will give equipment operators the ability to alter the lighting to suit the differing conditions on various parts of the golf course. You may also explore the newer LED (lightemitting diode) and HID (high intensity discharge) light systems that are popular with the off-road trucking set. These produce a very different quality of light from the standard halogens. GCM Scott R. Nesbitt (ORPguy@windstream.net) is a free-lance writer and former GCSAA staff member. He lives in Cleveland, Ga.

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