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Induction Lighting System -
Save more than 60% of Your Electricity Bill Compared to Your Conventional High Bay Metal Halide Lighting System


PowerTube® Induction Lighting Series helps to reduce
electricity wastage and consumption

Product Tested with Certification from:

Retrofit Your High Bay Metal Halide and
Start Saving Thousands of Dollars
and CO2 Emissions



The basic technology for induction lamps is not particularly new. Essentially, an Induction lamp is an electrode-less fluorescent. Without electrodes, the lamp relies on the fundamental principles of electromagnetic induction and gas discharge to create light. The elimination of filaments and electrodes results in a lamp of unmatched life. Lasting 100,000 hours or 25 years, this system can outlast 100 incandescent, five HID, or thirty typical fluorescent lamp changes.

Based on these well-known principles, light can be generated via a gas discharge through simple magnetism. Electromagnetic transformers, which consist of rings with metal coils, create an electromagnetic field around a glass tube which contains the gas, using a high frequency that is generated by electronic ballast. The discharge path, induced by the coils, forms a closed loop causing acceleration of free electrons, which collide with mercury atoms and excite the electrons. As the excited electrons from these atoms fall back from this higher energy state to a lower stable level, they emit ultraviolet radiation. The UV radiation created is converted to visible light as it passes through a phosphor coating on the surface of the tube. The unusual shape of an induction lamp maximizes the efficiency of the fields that are generated.

Although it is not breakthrough science, until recently, it has not been so commercially viable. New developments have broken down the barriers of costs and technological setbacks, such as EMC interference, lumen depreciation, ability to dim and a useful range of available wattages. Today, its obvious benefits make it the clear-cut choice for many lighting applications over traditional light sources.



1. What is Induction Light and the difference compared to traditional Fluorescent Light technology?
An induction light is similar to a fluorescent light in that mercury in a gas fill inside the bulb is excited; emitting UV radiation that in turn is converted into visible white light by the phosphor coating on the bulb. Like fluorescent, the phosphor coating determines the colour qualities of the light. Fluorescent lamps use electrodes to strike the arc and initiate the flow of current through the lamp, which excites the gas fill. Each time voltage is supplied by the ballast and the arc is struck, the electrodes degrade a little, eventually causing the lamp to fail. Induction lamps do not use electrodes. Instead of a ballast, the system uses a high-frequency generator with a power coupler. The generator produces a radio frequency magnetic field to excite gas fill. With no electrodes, the lamp lasts longer. Induction lamps, in fact, last up to 100,000 hours, with the lamp producing 70% of its light output at 60,000 hours. In other words, their rated life is 5-13 times longer than metal halide (7,500 to 20,000 hours at 10 hours/start) and about seven times longer than T12HO fluorescent (at 10 hours/start).

2. How efficient is it compare to other lights in energy saving?
The Induction Light generates more lumens output with lesser energy consumed. Typically, a 200W low frequency Induction Light can produce similar brightness compared to a 500W Metal Halide, achieving 60% savings. While induction lamps can generate more lumens per watt compared to metal halides, it is not as efficient as T5’s that powers 100+ lumens per watt, but there is a limitation of power output for T5, thus Induction lighting has a edge over T5 for environment with lighting system requires high output.

Induction Light operates at a temperature of 26°C as compared to Metal Halide of above 90°C. In an A/C environment, the use of Induction Light will reduce the cooling load to the air-conditioning system, thus reducing energy costs.

3. What kind of application is Induction Lighting for?
Induction lamps are ideally suited for high-ceiling applications where the lamps are difficult, costly or hazardous to access. They are also ideally suited for such applications where the advantages of fluorescent lighting are sought but a light source is needed that can start and operate efficiently in extremely cold temperatures. As a result, induction lighting is a suitable for a wide range of applications, including not only warehouses, industrial buildings, cafeterias, gymnasiums, etc., but also signage, tunnels, bridges, roadways, outdoor area and security fixtures, parking garages, public spaces, and freezer and cold storage lighting.

For some applications, well-designed linear induction hi-bays are better than well-designed HID hi-bays with regard to glare, contrast ratios and vertical footcandles. Here are two examples. Imagine yourself playing volleyball. As you follow the high arching ball coming towards you, would you prefer having to look up into a point source HID bi-bay or a 4ft long induction hi-bay with one 400W lamp? Imagine yourself as a forklift driver having to deal with vertical surfaces and load and unload pallets in high warehouse racks. Compare vertical footcandles with well-designed 4-ft., 8-ft. or extended-row linear induction hi-bays mounted in the middle of rack aisle row parallel to the racks with well-designed HID hi-bays mounted in the middle of rack aisle row. Envision how easily a loaded pallet can block the light from the point source HID lamp.

4. Is the cost of induction lighting system competitive to other source of lightings?
The increased costs occurs in the induction systems themselves – which could be 2-3 times more than metal halide systems, and also in new fixtures, which can inflate payback periods and reduce return on investment. But you also generally get more than 30% reduction in capital and operating costs immediately from the reduced number of fixtures made possible by the higher light output. You also get more efficiency in your energy consumption with not less than 50% savings in your electricity bills because the induction system (lamp and electronic ballast) is more efficient. Apply that over ten years plus replacement and maintenance costs and suddenly it makes a lot of sense to go into induction lighting systems.

5. What advantages are there for induction lights v. metal halide?
One of the biggest advantages in application that induction lighting has over metal halides is the ability to instantly start and shut off. We see a worldwide increasing trend of growing replacement of metal halides to induction in areas like tunnel and street lighting. Why? Because a driver driving at 80kmh cannot afford to be inside a pitch dark tunnel for more than 2 minutes waiting for the metal halides to restart! Many tunnel lighting fixtures have an emergency direct current backup where the light will run on batteries until the electrical power is back up. Metal halides, once turned off in an outage require a cooling off period for the gases to return to a solid state before it can restart itself. A solution to this problem is to install fluorescent lamps such as T5’s or CFL lamps, as emergency lamps that will light up immediately. But that in turn increases the installation of fixtures and lights, as well as periodically testing these back up lamps to see if they are still functional. Not to mention that these are usually installed in minimum quantities and in low wattages that barely suffices as emergency lighting. The tunnel fixture installed with induction lamp is able to switch to DC power immediately and keep the tunnel lit as if nothing has happened.

Another advantage induction lighting has over metal halide is lumen maintenance. Most significantly, at 40% of service life, metal halide’s light output and efficacy experience severe degradation. A 400W metal halide lamp, for example, may produce 36,000 lumens but 25,000 at 40% of life, a 30% decline. Therefore, unless the lamps are periodically grouped re-lamped, a large system’s “average” performance over time is much lower than its initial ratings. Tests on the 400W PowerTube® Induction lamps on the other side, retains 90% output after 20,000 hours (that’s already more than the rated hours on metal halides) and still puts out 80% after 60,000 hours. You would have replaced at least 6 metal halide bulbs by then and the last bulb will be running at 50% output.

6. How does induction light compare with T5?
The T5 is a very effective fluorescent light because it tops 100 lumens per watt whereas the Induction Lights generates between 80 and 85 lumens per watt. The only problem is T5 is not available in higher wattages – you can generally find a high output T5 tube up to 58W, but there is a German manufacturer that produces a 90W T5 at a relatively high price. When you are limited to small wattages, you have no choice but to use multiple tubes together to increase the total lumens output, hence increasing your material costs in terms of additional inventory and lighting fixtures.

7. Is LED more effective than Induction Light?
We all know that Light Emitting Diodes (LED) are not considered for general lighting purposes because of its limited spectrum, brightness and poor colour rendering, but this is compensated by its high reliability and high colour temperature. It is still a common mistake that many people make thinking that higher colour temperature, say 6000k, means higher brightness.

LED however, does have the same theoretical lifespan of 100,000 plus hours as induction light, given that the integrated chip does not fail before the diode. Many LED manufacturers neglect to fit a decent high temperature IC or integrate some kind of heat dissipation device and their LEDs fail after only 10,000 hours.

Induction light on the other hand, offers the same stability and lifespan as LEDs but is available in much higher wattages and brightness that it can truly replace incandescent and discharge lamps as the next revolutionary lighting source. In the end, both are emerging technologies and are getting as much attention and improvements as the other so you can expect these problems to be corrected in the near future.

8. Is the Induction Light only applicable to lighting system requires high output?
Generally, the Induction Light is best suited to area where the lamps are difficult, costly or hazardous to access. Most of these areas are installed with high output lightings. As technologies improved, PowerTube® has developed a wide range of Induction Lighting profiles ranges from the lowest of 15W to the highest of 400W output. We also carry a wide range of fittings suitable for various Induction Light application, i.e. High Bay , Wall Pack, Floodlight, Down Light and Underwater lights.

Induction Light Profile

Induction Light Fittings

9. What is the technical specification for Induction Light?
For the Powertube® Induction Light technical specification and product information, you may access here.


For further enquiry, you may contact our office at:

Energy Partnership
9 Jurong Town Hall Road, #02-68 iHub
Singapore 609431
Tel : 65-6561 1709
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