Question

You are thinking about upgrading some lamps in your building. There is a mixture of existing T12 fluorescent lighting and older metal halide lighting to replace. There is a suggestion to use T5 linear fluorescent lamps.

What are your concerns?
a. Fluorescent lamps are sensitive to temperature - so the temperature of the space to be lit should be checked to be sure it is suitable. Also T5 Lamps may not be the same length as the T12 lamps. New futures may be required.
b. Fluorescent lamps have a long warm-up and restrike time. It used to replace metal halide factures, occupancy sensors may not be fessible in that space
c. Fluorescent lamps have hight initiat cost. it is unlikely that this change will save money.
d. All of above

Answer 1

When thinking of upgrading to T5 fluorescent lamps, concerns include their sensitivity to temperature, compatibility with existing fixtures, the long warm-up time, and higher initial costs. However, their energy efficiency and potential for cost savings on energy bills can outweigh these initial concerns.

Step-by-step explanation:

When considering an upgrade from T12 fluorescent lighting and older metal halide lighting to T5 linear fluorescent lamps, there are several concerns that need to be addressed. These include:

• The sensitivity of fluorescent lamps to temperatures is important—you'll want to ensure the lamps are suitable for the temperature of the space they will be installed in. Additionally, T5 lamps might not be the same length as T12 lamps, potentially necessitating new fixtures.
• Fluorescent lamps also have a long warm-up and restrike time, which can be problematic if they are to replace metal halide fixtures, especially in areas where occupancy sensors are used. These spaces may not be feasible for fluorescent lamps due to the delay in reaching full brightness.
• While it's true that fluorescent lamps have a higher initial cost compared to some other options, the savings in energy consumption and longer life span can make up for the upfront investment in the long term. Considering that about 20% of a home's energy use and around 40% for commercial establishments goes to lighting, efficient lighting such as CFLs and LEDs can offer significant energy savings. Fluorescent lamps, including CFLs, are approximately four times more efficient than incandescent lamps, and new LED lights are even more efficient and have longer lifespans, though their initial costs remain high.

In essence, while T5 lamps may present some initial challenges and costs, they could offer considerable energy savings and lower environmental impact over time when used in appropriate settings.