Fastek specializes in commercial contracting, electrical maintenance and design build contracting.
Energy-Efficient
Lighting Retrofits PDF
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- Edmonton, AB T5M 1Y6
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Energy-Efficient Lighting Retrofits
Conserve energy and save money by installing high-efficiency lighting
Lighting systems represent a significant amount of a facility's power consumption. With the improved technology in lighting products, there is great potential for energy saving. A lighting fixture retrofit and redesign can improve the quality of lighting in your facility while reducing the amount of energy consumed - which saves you money. Adding lighting controls will maximize the energy efficiency of your new lighting system, which can reduce power consumption up to an additional 40%.
Whether converting T12 lighting to T8 or replacing metal halide lighting with T5, we can help you do it. Your Fastek Project Manager will explain the benefits of each type to find the right fixture for you.
Fastek Electrical Installations can help you design and install the best lighting solution for your facility. Whether you replace one fixture at a time, or the entire system, Fastek is ready when you are to ensure a smooth transition.
Metal Halide vs. Fluorescent Lighting
| Motion Sensors Application C | |||||
|---|---|---|---|---|---|
| Comparison Dimension | 400W Metal Halide |
6-Lamp T8 High Bay |
4-Lamp T5 High Bay |
6-Lamp T8 High Bay |
4-Lamp T5 High Bay |
| Number of Lamps | 1 | 4 | 6 | 4 | 6 |
| Lamp Watts (W) | 400 | 216 | 324 | 216 | 324 |
| Fixture Watts (W) | 455 | 234 | 351 | 234 | 351 |
| Initial Lumens | 40,000 | 20,000 | 30,000 | 20,000 | 30,000 |
| Mean Lumens | 21,000 | 19,400 | 29,100 | 19,400 | 29,100 |
| End of Life Lumens | 15,750 | 18,000 | 27,000 | 18,000 | 27,000 |
| Rated Lamp Life (hrs.) | 24,000 | 20,000 | 20,000 | 20,000 | 20,000 |
| Conventional Lumens per Watt | 75-100 | 90-104 | 90-104 | 90-104 | 90-104 |
| Color Rendition Index | 60-70 | 85-98 | 85-98 | 85-98 | 85-98 |
| Yearly Operating Cost B | $123.68A | $63.61A | $95.41A | $34.99A | $52.48A |
| Strike Time | 4 m | <1.5 s | <1.5 s | <1.5 s | <1.5 s |
| Re-strike Delay | 10 m | <1.5 s | <1.5 s/td> | <1.5 s | <1.5 s |
| Multi-level Switching Capability | No | Yes | Yes | Yes | Yes |
| Occupancy Sensor Friendly | No | Yes | Yes | Yes | Yes |
| Lamp Replacement CostD | $26.79 | $16.56 | $39.56 | $16.56 | $39.56 |
| Ballast Replacement CostD | $114.92 | $26.01 | $129.00 | $26.01 | $129.00 |
A Assuming 10 Hours a day, 5 days a week, 52 weeks of the year.
B Average Electrical Rate in Edmonton over the past 12 months is 0.10455/kWH ending March 2009.
C Motion Sensors savings represent a 45% reduction in use. Results may vary in specific application.
D Replacement Costs reflect material cost only.
Description of Comparison Dimensions
Below you will find a description of the dimensions used to compare the standard 400W Metal Halide fixture against the 6-lamp T8 and 4-lampT5 fixtures
- Number of Lamps: This is the total number of lamps contained in the fixture. It may seem trivial, but when you realize that you could be left in the dark when a single lamp fails in a 400W MH system, the implications are obvious. Even though there are more lamps in a T8 or T5 system, the lamps are less expensive to replace.
- Lamp Watts: This describes the total amount of power in watts consumed by the lamps in the system.
- Fixture Watts: This details the total amount of power in watts consumed by the entire light system. This is the sum of the lamp watts and the ballast power consumption. It's important to note that when comparing a Metal Halide high bay with a T8 or T5, the Metal Halide ballast consumes much more power than the T8 or T5 ballast.
- Initial Lumens: This describes the rated light output for the specific lamp type at the beginning of its useful life.
- Mean Lumens: This describes the rated light output for the specific lamp type at approximately 40% of its useful life. Notice the steep depreciation in lumen output for the standard 400W metal halide when compared with the T8 and T5 fixtures.
- End of Life Lumens: This describes the expected light output for the specific lamp type at approximately 95% of its useful life. While the T8 and T5-based systems have only a small amount of depreciation, the 400W Metal Halide fixture continues its steep lumen drop throughout its life. The Metal Halide fixture is still consuming 100% of the rated power, but converting less and less of this energy into light. The remaining energy is wasted as heat.
- Rated Lamp Life: This is the number of hours the manufacturer has rated these lamps to function as specified. These lamps are typically rated at 10 hours per start. At or near the end of life, metal halide lamps are known to "cycle." This means they turn on, heat up, turn off and repeat.
- Conventional Lumens per Watt: This dimension compares the amount of light output per system watt. It is a measure of efficacy for the fixture. The higher the number, the more light you can get for a given amount of power.
- Color Rendition Index: The Color Rendition Index (CRI) is the measure of the ability of a light source to reproduce the colors of various objects faithfully in comparison with an ideal or natural light source. The lower CRI negatively impacts visual acuity and can strain the eye.
- Yearly Operating Cost: This is the dollar amount it costs to operate a single fixture for one year assuming 10 hours per day, 5 days per week, 52 weeks per year and $0.10455 per kWh energy cost.
- Strike Time: This comparison dimension identifies the delay required to bring the lamp to full brightness from a cold start.
- Re-strike Delay: This comparison dimension identifies the delay required to bring the lamp to full brightness between starts. This is pertinent when power is temporarily lost. Facilities that use metal halide lighting would have to rely on emergency lighting during the re-strike delay. For facilities that use T8 or T5 lighting, the fixtures would turn back on almost instantly.
- Multi-level Switching Capability: This comparison dimension identifies if the particular fixture can be configured to have multiple levels of brightness. Some newer metal halide fixtures do offer this function, but the traditional fixtures did not. The multi-lamp nature of T8 and T5 systems makes multi-level switching very simple. Modern T8 and T5 ballasts even include extra switch legs to allow for simple switch or sensor wiring.
- Occupancy Sensor Friendly: This identifies if the fixture works well with occupancy-based sensing systems. Occupancy sensors can significantly cut energy consumption when applied in low-use areas up to 45%. The strike/re-strike times associated with metal halide lights prevents their use in these fixtures.