In addition, a key factor in determining if the added LED bulb life makes a retrofit cost effective is the cost of labor to replace the lamps after the initial installation. Metal halide bulb replacement will require twice the labor compared to LED. Does this savings exceed the bulb cost differential?
Green Creative 57936 – 27W LED – 70/100W HID Equal – EX39 – 4000K
Of course there are other factors than lamp life to consider. Energy savings could be significant. A 400 watt metal halide bulb can be replaced with a 200 watt LED. A 100 watt metal halide can be replaced with a 50 watt LED. Implementing an LED replacement program should result in a 50% reduction in annual energy use (kWh) costs. It may also lower electric demand (kW) charges. The impact of this savings depends on the number of lamps being replaced, the time of operation and the electric rates.
At initial start up, metal halide requires a 2 to 5 minute warm up time for cold lamps before full light output is achieved. Also, if power is interrupted, even momentarily, traditional “probe start” metal halide systems require a 5 to 10 minute cool down before the lamps can be restarted and then an additional warm up period of 10 to 15 minutes before full brightness is achieved. For “pulse start” systems the hot restart time is reduced to 3 to 4 minutes. Nevertheless, any lighting down time puts a stop to normal activities. LED is an instant ON technology — no matter what the temperature in the space, when the switch is flipped, the lights come on at full light output.
Restaurant lighting, once simply a matter of flooding the dining area with as much light as possible, now varies considerably depending on the type of restaurant.
For example, you could upgrade a 32 watt T8 fluorescent system with a 25 watt, 28 watt or 30 watt T8 fluorescent system that will reduce energy costs and provide a 30,000 to 40,000 hour rated lamp life. Compare this to replacing the 32 watt T8 bulbs with 17 watt T8 LED lamps that are rated for 40,000 to 50,000 hours. If the existing fluorescent bulbs are using either instant start or program start ballasts, many LED tubes can directly replace the fluorescent and use the same ballast. While the LED option appears to be the winner in terms of energy savings, the deciding factor between a fluorescent upgrade and an LED conversion will probably come down to how significant the energy savings will be and the initial costs.
Home Lighting Applications Energy Efficiency Replacing HID with LED in High Bay Applications Offers Potential Benefits But Requires Careful Analysis
Sylvania 74464 – 35W LED – 35W HID Equal – 120-277V – 2700K – Ballast Bypass
LED Offers Long Life, Lower Energy Costs, Instant On and Control Options
GE 88109 LED130/2M400/750 | 130W LED 400W HID Equal – Direct Replacement
Casual themed breakfast, lunch and dinner restaurants cater to diners who want good food at value pricing and quick, efficient service. These establishments often have a consistent, comfortable ambient light level throughout the dining area. Large pendants or fluorescent fixtures provide the generalized illumination. Bright illumination and minimal contrast give these spaces an active, functional vibe.
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The key point — whether it’s fast food or the ultimate high end dining experience, the lighting should reinforce the expectations of the target customers and not distract from the dining experience.
Ultimately the decision to transition from metal halide equipped high bay fixtures to LED requires careful consideration of these and potentially other issues. Each application will have unique requirements that may favor or discourage a change. The best advice may be to recommend a test installation where factors such as initial installation costs, light distribution changes and occupant responses can be analyzed and factored into the known savings in labor for future bulb replacement and lower energy costs.
If the existing high bay fixtures utilize a lens, the LED replacement lamp will be fully enclosed. While the lens may help spread the light across the space, it may also cause less effective heat dissipation. LED bulbs have a better chance of reaching their life expectancy when they are operated in well-ventilated, open fixtures. Removing the lens of the high bay fixture may solve the heat build-up issue, but it may also result in complaints of glare or uncomfortable brightness from the workers or occupants in the space. This issue may require experimentation to find an acceptable solution.
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Home Lighting Technology LED LED Replacement Lamps Enhance Restaurant Lighting and Reduce Costs
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Lighting, one of the key components of the overall customer experience when dining out, provides the restaurant owner with the benefits of aesthetic appeal along with the hassle of ongoing maintenance requirements and potentially high energy costs. The emergence of LED lighting offers restaurant owners an opportunity to maintain or enhance the lighting environment in their restaurant while reducing operating expenses. In some cases this means only deciding to purchase equivalent LED bulbs instead of existing incandescent, halogen or fluorescent. Most LED bulbs are designed to directly replace existing light sources without any modifications to the fixture.
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While metal halide has proved to be a desirable light source for high bay fixtures, the emergence of high lumen output LED replacement lamps for HID gives managers of facilities utilizing high bay and school gymnasium maintenance staff an opportunity to evaluate the benefits of a change.
Finally, depending on the type of metal halide bulbs being replaced with LED, the quality of the illumination — better color rendering — can be achieved.
Restaurant owners looking to reduce lighting energy and maintenance costs while not compromising the lighting design that works for their restaurant, can take advantage today (2016) of 5th generation LED light bulbs that not only perform at a level matching or exceeding other light sources, but can be purchased at the lowest prices ever.
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The 35,000 to 50,000 hour bulb life of LED, such a dramatic difference when compared with 1000 hour incandescent or 2000 hour halogen, is less dramatic with metal halide. Typically, the type of metal halide light bulb used in high bay applications has a rated life of around 20,000 hours. While LED replacements available today double that expected life, the benefit must be weighed against the additional initial cost of LED high wattage bulbs compared to metal halide.
All of these spaces use lighting that presents opportunities for either direct replacement of existing bulbs with LED light bulbs, or, retrofit with dedicated LED fixtures.
As a starter, a good strategy is to experiment by changing one area of the lighting to LED. Perhaps only replace the PAR halogens over the bar or in recessed downlights with PAR LEDs. By proving the concept, without much risk, you may then be ready to expand LEDs to other lighting throughout your restaurant.
Other spaces, including bars and kitchens have lighting requirements that are unique from the dining area. Bars usually rely almost exclusively on accent or downlights and kitchens, where heat is an issue, usually use fluorescent fixtures for general lighting of the food prep area.
Post navigation LED Replacement Lamps Enhance Restaurant Lighting and Reduce Costs Tips for Facility Managers On Evaluating a Transition to LED Lighting
With the right LED lighting retailers can create a compelling brand identity to engage and inspire shoppers. While software apps over in-store positioning (IPS) can guide and personalize the shopping experience.
Post navigation Cost Effective LED Retrofits Help Schools Reduce Operating Costs Replacing HID with LED in High Bay Applications Offers Potential Benefits But Requires Careful Analysis
Several manufacturers now offer LED replacement options for high wattage metal halide lamps. The are generally available in two versions. Some LED replacements utilize the existing metal halide ballast, so the retrofit is simply a matter of removing the metal halide bulbs and replacing them with LED in the same socket. The other option, ballast bypass, requires rewiring the fixture to take the ballast out of the circuit and supplying line voltage directly to the sockets. While the advantages of these LED retrofits for metal halide may not be as dramatic as those for LED replacements for incandescent and halogen bulbs, they are significant enough to recommend a close look.
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Standard 17W T8 LED – 32W Equal – 48″ – 3500K – Instant/Program Start
On the other hand, restaurants offering a fine dining experience look for a lighting system that enhances both the mood and the architecture of the space. Accent lighting takes precedence over general ambient illumination. Instead of fluorescent light sources, halogen or decorative incandescent lighting, such as vintage bulbs, predominates. This type of restaurant evokes the desired mood in the dining area with lighting that creates visual contrast and with dimming controls to modulate light levels.
Replacing HID with LED in High Bay Applications Offers Potential Benefits But Requires Careful Analysis
Popular in many restaurants today are string lights or open pendant fixtures fitted with exposed filament incandescent bulbs. These bulbs provide both a decorative function as well as help establish a retro mood with the warm, amber illumination and visible filaments similar to the earliest incandescent light bulbs. Manufacturers have responded to this surge in interest for incandescent vintage style bulbs by offering LED vintage versions that produce the same look but with lower energy costs and extremely long bulb life.
LED is also an easier light source than metal halide to modulate with control devices. Because it is instant ON, in some applications, occupancy sensors can be used to limit lighting ON time in a space only for times when the space is actually being used.
LED Replacement Lamps Enhance Restaurant Lighting and Reduce Costs
The lighting for warehouses, manufacturing facilities, industrial work spaces, big box retail and gymnasiums often consists of high bay fixtures equipped with and HID light source — usually metal halide lamps. The higher wattage metal halide bulbs used in the high bay ceiling fixtures provide the lumen output and general lighting distribution required for these applications.
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Dave has been active in the lighting industry since 1994. Formerly a member of the Illuminating Engineering Society of North America and certified by the National Council On Qualifications for Lighting Professionals, Dave now writes blog posts, lighting tips and provides lighting product assistance for the Topbulb website.
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With or without the fixture lens in place, the light distribution pattern may change when LED replaces metal halide. Building managers can determine the extent of this change by installing and monitoring one or two LED replacements. In warehouses with high storage racks, anticipating both the difference in LED lumen level and light distribution at the top of a stack compared to the bottom will help in decision-making process.
Standard – 7W 12V LED – MR16 – Flood – Neutral White – Dimmable
One safety recommendation is worth noting. For ballast bypass retrofits, where the wiring is disconnected from the ballast and directly connected to the bulb socket, a fast acting fuse should be installed to prevent explosions in case a conventional metal halide is later installed without reconnecting the ballast.
Metal halide, which always requires connection to a ballast, offers intense, bright white illumination with relatively long lamp life — up to 20,000 hours. Compared to mercury vapor or high pressure sodium alternatives, halide compounds in the quartz tube improve color rendition which gives metal halide lamps the higher quality illumination often desired in high bay applications such as big box retail.
LED technology has other potential benefits than long life and lower energy use. It also overcomes specific drawbacks of metal halide.
For example, directional accent lighting presents an excellent opportunity to utilize LED PAR and LED MR bulbs as direct replacements for halogen. The LED bulbs can deliver the same range of beam spreads from spot to flood, the same beam intensity and match the appearance of halogen white light. LED even broadens your color temperature options by giving you both warmer and cooler light than halogen. In addition, LEDs are usually dimmable when operated on compatible dimmers.
Almost all restaurants use fluorescent tubes either in kitchens, restrooms or as a general dining room light source. High efficiency, long life T8 fluorescent lamp / ballast systems are competitive with LED T8 replacements making the move to LED a more complicated decision than when replacing halogen or incandescent lighting.
Bulbrite – 2W LED Vintage Filament Style – G16 – Candelabra Base
Before we look at LED opportunities, lets briefly review some basic restaurant lighting design principles.
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