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Frequently Asked Questions

We have T8 fluorescent fixtures everywhere. I have been asked to reduce energy consumption and I have a very limited budget. What is my cheapest and easiest solution?

KOJIN's patented Nano Reflectors are a quick and inexpensive solution for T8 fluorescent lamps. These reflectors can increase light output by up to 60%*. With the increased brightness to the workspace, there is the opportunity to de-lamp and realize energy savings of up to 50%.

*60% increase in lux at task level. Lux levels vary depending on distance from light source.

Since the T12 phase out in 2012, we are having trouble finding replacement parts, but fluorescent lamps are still the most economical option for us. Should we move to T8 fixtures?

In our view, the energy and economic benefits of switching from T12 to T8 is not significant enough to affect your bottom line. A T12 to T8 switch is not as simple as replacing a 40 or 50-watt T12 bulb with a 36-watt T8 bulb; the ballast must also be replaced. In addition, many T8 ballasts are less energy efficient than the T12’s, which could add 6-10% energy consumption. Why not go straight to T5 fixtures?

What about the cost of replacing a T12 or T8 fixture with a T5 fixture? Isn’t the labor cost going to offset the savings from the conversion?

That is the beauty of our innovative solutions! While we offer different options, the easiest and most cost-effective way to convert a T12 or T8 fixture to a T5 solution is to keep the existing fixture shell and replace the lamps with KOJIN's innovative T5 Conversion Kits. The installation time is less than 10 minutes per fixture!

It seems simple, but is the product safe to install this way?

Yes, because the old ballast is removed from the fixture and the power re-wired to the tombstones. KOJIN conversion kits are self-ballasted and installation is as simple as inserting a lamp.

What exactly is a “T5 Conversion Kit”, and how does it work?

KOJIN T5 conversion kits are self-ballasted and use the existing housing thereby saving time, money and labor costs. T5 lamps are shorter than T8 and T12 lamps by approximately 2 inches. Due to the small diameter of the T5 lamps, the bi-pins on either ends of the lamp are also much closer together than on the T8 or T12 lamps. The ballast is contained within aluminum housing with the adapters on either side. The adapters allow the kit to fit into traditional T12 and T8 connections. Removal of the old ballast is necessary.

What is involved to replace our T12 or T8 lamps with your T5 conversion kit?

Since the KOJIN T5 Conversion Kit comes with its own built-in ballast, it is imperative that the old ballast(s) be disconnected from the electrical circuit. The 3-step-process is:

   1) disconnect the old ballast(s),
   2) reconnect the wires to ensure working electrical circuit,
   3) insert the T5 kit into the T8/T12 sockets.

KOJIN recommends that a qualified electrician be consulted for proper installation or conversion.

If we can easily convert from T12 or T8 lamps to more energy efficient T5 lamps using your T5 Conversion kits, why do you offer T5 lamp fixtures?

We offer a range of products to accommodate the different budget needs of our customers. In the interest of quick savings and low labor costs, many customers are more than satisfied with the retrofit option. However, some customers prefer to replace entire troffers and have the integrated look of new fixtures.

How do I decide between the two options – T5 conversion kit or replace entire lamp tray?

For the most part, it is simply a question of preference and there are two considerations to keep in mind - budget and esthetics. Product costs aside, the labor for installing new lamp trays may be higher and more involved than the labor for installing KOJIN T5 Conversion Kits. The decision could also depend on the condition of your existing light fixture.

What is the potential energy savings, by converting from T12 to T5 fixtures?

For a 4ft fixture with 4 lamps:

T12 T5
Lamp Wattage 160 watts (40W x 4 lamps) 112 watts (28W x 4 lamps)
Average Ballast Wattage 32W 1W
Total 192 watts 113 watts

That's a savings of 79 watts or 41% per fixture! Now multiply that number by the number of T12 fixtures in your facility and see the potential savings! Use our Energy Savings Calculator for a more comprehensive breakdown of your savings.

The increased light output due to the addition of KOJIN Nano Reflectors, allows you to de-lamp. Instead of replacing 4 T12 lamps with 4 T5 lamps, KOJIN lights are bright enough that you could potentially replace 4 T12 lamps with 2 T5 lamps!

Are the products safety-certified for use in my country?

Safety is KOJIN's number ONE criterion for product development. While most countries set safety standards for electrical products, our experience has been that North America's are the most stringent. KOJIN products are submitted to UL (Underwriter Laboratories) for testing and certification. By the time UL puts their stamp of approval on our products, we know the products have been rigorously tested. Recognizing the rigorous demands of UL certification, most countries with other certification bodies will automatically accept UL-certified products. KOJIN will not sell products that have not been UL/cUL certified.

What is “power factor”?

Power factor (pf) measures how efficiently a ballast uses the power coming in. In its simplest form, power factor is the ratio of actual power used by an electrical device and the apparent power that is applied to the device.

Power Factor = Actual Power / Apparent Power

The higher the power factor, the more efficient the equipment is at using the electricity coming in from the utility company. The job of the ballast is to stabilize the current through the lamp, using resistors to regulate the current flow. So, if the lamp uses 28 watts of energy, the ballast adds a “drag” that adds some resistance to the current so that the lamp does not overheat. This resistance increases the actual power, so that the ratio between actual and apparent power would be less than 1. The closer the power factor is to 1, the more energy efficient the product.

Older T12 and T8 ballasts have a power factor of less than 0.75 whereas KOJIN's T5 Conversion Kits have a power factor greater than 0.95. An electrical system that has lower power factor will waste more energy than one with a higher power factor. Another way to look at this is that at 0.75, close to 25% of energy is expended by excess resistive sources whereas at 0.95 only 5% of energy is wasted.

In a nutshell, KOJIN products save money by:

   1) reducing the overall wattage of the lamp and ballast;
   2) using the energy provided more efficiently;
   3) eliminating penalty charges (from some utility companies) for inefficient use of energy caused by low pf electrical devices.

What is “ballast factor”?

Ballast factor (BF) is a measure of the actual lumen output for a lamp on a commercial ballast system (system lumens) compared with the rated lumen output for the same lamp on a reference ballast under controlled test conditions (rated lumens). The ballast factor shows the relationship between the ballast and the lamp.

Unlike power factor, ballast factor is not a measure of energy efficiency but is used in lumen method lighting calculations. Ballast factors range from 0.70 and 1.20 with a normal or "standard" range of 0.85 and 1.00.

What about LEDs?

LEDs are a great lighting solution but they are still a relatively expensive option compared to T5 fluorescent lighting. As well, problems with the life span and heat sink issue of LEDs still exist. LEDs also tend to shift in color due to age and temperature. Recent studies have also suggested that LEDs could contribute to health issues.