284 WWW.HOGSLAT.COM #OIMLM-SSWR-JB.10-watt w/ Junction box adaptor #OIMLM-SSWR-JJ..........10-watt w/ Jelly jar adaptor AgriShift® Swine Lighting The AgriShift® MLM-S is a durable and efficient swine lighting solutions designed to evenly distribute light for both the herd and humans caring for them. The red spectrum used makes it easy to provide daylight simulation for improved productivity. Features: • Highly efficient fixture suitable for modern swine facilities • Species-specific spectral output featuring Dim-to-Calm™ technology • Fully dims* to red, which swine perceive as darkness • Can act as a “service light” when fully dimmed • Durable Built For Your Barn® design • Luminous Flux – 1040 lm • Equals 75W Incandescent • 200° Beam Angle #OIMLM-FSWB-JB.10-watt w/ Junction box adaptor #OIMLM-FSWB-EB..................10-watt w/ edison base #OIMLL-FSWR-HW........12-watt w/ hard wire adaptor AgriShift® Broiler, Pullet and Turkey Lighting The AgriShift® MLM-B has an optimized color spectrum with full dimming capability, meeting the birds’ developmental needs at every stage of growth. It is designed with Dim-to-Blue® technology to enhance animal welfare, better flock performance and improve feed conversion rates. Features: • Enhanced blue/green spectrum • Fully dims to provide natural daylight simulation* • Luminous Flux – 1382 lm • Equals 60W Incandescent • 200° Beam Angle #OI30-014-00178............Master Controller 120V #OI30-014-00189 .................Slave Dimmer 120V #OI30-014-00180..........Master Controller 240V AgriShift® Dimmer Control The AgriShift® Master Controller and Slave Dimmer provide full potential to any ONCE® lighting fixture. They offer smooth dimming solutions that can easily be controlled manually with the front panel controls or remotely with a 0-10VDC control signal. Issues with Poultry House LED Lamps and Light Dimmers Poultry growers have seen remarkable energy savings from transitioning from incandescent to LED lamps. However, recently there have been an increasing number of issues with erratic dimming, excessive lumen depreciation, and premature lamp failures. Evidence points to an incompatibility between LED lamps and the light dimmer as the main cause of these issues. Incandescent (left) and LED lamps center, with globe removed, and right). Issues with Poultry House LED Lamps and Light Dimmers LED lamps have changed the landscape for poultry growers in terms of energy savings related to poultry house lighting. No other lighting source (incandescent, compact fluorescent, cold cathode, high pressure sodium, etc.) comes close to the energy efficiency of LEDs. LEDs are roughly 80–85 percent more efficient than incandescent lamps. However, during the transition from incandescent to LEDs, there have been some hiccups (Tabler et al., 2019). Starting late last fall, we began getting an increase in calls from growers concerning strange dimming issues and premature LED lamp failures. Trips to various poultry supply vendors and LED distributors revealed boxes and boxes of failed LED lamps (still under warranty) of various brands that had been returned by growers. Through conversations with these vendors and distributors, we determined that the premature lamp failure problem had been steadily increasing in recent months. This is not normal nor expected, and it led us to dig a little deeper into what was going on. While we haven’t solved all the problems, we now better understand much of what is causing premature LED lamp failures and why some LEDs are losing brightness much more quickly than expected. Like many other complicated issues, it is not just one thing causing these problems. A part of the issue is the lamps, a part is the light dimmer, and a part is the compatibility between the lamps and the dimmer. Incandescent and LED Lamps Thomas Edison patented the incandescent light bulb (Figure 1; left) in 1879. It became one of the most worldchanging inventions ever conceived. It produces light by forcing electrical current through a high-resistance tungsten filament. The result is about 80 percent heat and 20 percent light. Newer LED lamps (Figure 1; center, with globe removed, and right) produce light by switching Figure 1. Incandescent (left) and LED lamps (center, with globe removed, and right). Figure 2. LED lamp with globe removed to show LED chips. lumen depreciation, erratic dimming performance, and premature total lamp failure have been reported on LED lamps that were only 2 to 3 years old; in many cases, several years before the warranty had expired. Issues with Poultry House LED Lamps and Light Dimmers LED lamps have changed the landscape for poultry growers in terms of energy savings related to poultry house lighting. No other lighting source (incandescent, compact fluorescent, cold cathode, high pressure sodium, etc.) comes close to the energy efficiency of LEDs. LEDs are roughly 80–85 percent more efficient than incandescent lamps. However, during the transition from incandescent to LEDs, there have been some hiccups (Tabler et al., 2019). Starting late last fall, we began getting an increase in calls from growers concerning strange dimming issues and premature LED lamp failures. Trips to various poultry supply vendors and LED distributors revealed boxes and boxes of failed LED lamps (still under warranty) of various brands that had been returned by growers. Through conversations with these vendors and distributors, we determined that the premature lamp failure problem had been steadily increasing in recent months. This is not normal nor expected, and it led us to dig a little deeper into what was going on. While we haven’t solved all the problems, we now better understand much of what is causing premature LED lamp failures and why some LEDs are losing brightness much more quickly than expected. Like many other complicated issues, it is not just one thing causing these problems. A part of the issue is the lamps, a part is the light dimmer, and a part is the compatibility between the lamps and the dimmer. Incandescent and LED Lamps Thomas Edison patented the incandescent light bulb (Figure 1; left) in 1879. It became one of the most worldchanging inventions ever conceived. It produces light by forcing electrical current through a high-resistance tungsten filament. The result is about 80 percent heat and 20 percent light. Newer LED lamps (Figure 1; center, with globe removed, and right) produce light by switching current to a series of light-emitting diodes. LED lamps contain circuitry that includes drivers and light-emitting diode chips (Figure 2). Modern LED lamps are very efficient in comparison to Edison’s incandescent lamps. However, incandescent lamps are much easier to dim. In contrast, LED lamps are much more sophisticated and require special considerations for dimming and proper performance. In less than a decade, the entire world (poultry industry included) has made a dramatic shift from incandescent lamps to dimmable LED lamps. Despite some growing pains along the way, the energy savings and long-life potential of LED technology made the frustration worth it. However, within the poultry industry during the past 8 to 10 months, widespread problems with rapid Figure 1. Incandescent (left) and LED lamps (center, with globe remo and right). Figure 2. LED lamp with globe removed to show LED chips. lumen depreciation, erratic dimming performance, a premature total lamp failure have been reported on L lamps that were only 2 to 3 years old; in many cases, several years before the warranty had expired. Investigations have determined that multiple brands of LED lamps are affected, but the issues are particularly severe with inexpensive, omni-directiona LEDs intended for household use and not designed fo more demanding and harsh chicken house environme However, the issues are also present in high-quality, h duty, directional LEDs specifically designed to withsta commercial poultry industry demands. In today’s chic house environment, the level of dimming and the wid variation in light levels required over the life of the flo demand that lamps and dimmers be compatible and designed to work well with each other. While they are less expensive than high-grade agricultural LED lamps, household LED lamps do not hold up well in a poultry house environment an Summary of Mississippi State University Extension publication, 3510 (POD-08-20) For the full article, go to http://extension.msstate.edu/ publications/issues-poultry-houseled-lamps-and-light-dimmers Reports from both the lab and the field tend to indicate that leading-edge dimmer technology and modern LED lamp technology are simply not compatible. However, it may be that poultry growers should consider switching to trailing-edge dimmer technology to alleviate incompatibility issues between LED lamps and leading-edge dimmers. LED lamp with globe removed to show LED chips. Leading-edge dimming technology tends to produce current spikes that are detrimental to LED chips in the lamps. The damage to LED chips caused by these current spikes appears to be cumulative over time and is irreversible. It will eventually lead to accelerated lumen depreciation, strange and erratic dimming problems, and premature lamp failures. Leading-edge dimmers are, by far, the most common light dimmers in poultry houses today. However, trailing-edge dimmers are much more compatible with today’s LED technology. We will continue to follow this situation. No grower wants to spend money needlessly, but neither do they want to deal with continuing dimming issues, excessive lumen depreciation, and premature bulb failures if a trailing-edge dimmer will stop the problem.
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