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FAQ's:
What is the warranty on Lumatek ballasts?
5 years.
What is the warranty on Lumatek lamps?
1 year from manufacture.
What is the warranty on Lumatek Reflectors?
1 year.
Can I run a CMH lamp with a HPS ballast or a CMH ballast with a HPS lamp?
No, as they are different technologies.
Can I run a 400 watt lamp in the Lumatek 600 watt dimmable ballast?
Yes, you can run a 400 watt lamp in the 600 watt ballast dimmed to the 400 watt setting. Since the voltage output for the 600W ballast is the same as the 400 watt lamp this combination works perfectly.
What is Kelvin?
The Kelvin Color Temperature Scale is a measurement of discriminating colors for the human eye. Color temperatures over 5,000K are called cool colors (blue/white), while lower color temperatures (2,700–3,000 K) are called warm colors (yellow/white through red). This is a measurement for the human eye, but serves as a reference for helping consumers know which lamp to buy for which stage of growth.

Not all growers are able to buy four lamps for every fixture, so the "one lamp system" means you could use the 4K for all stages of plant growth if needed. Your plants will get photo-chemical reactions with a Lumatek lamp that is more than could be achieved with any traditional lamp that was made for human vision.

HPS - Recommend for the majority of flowering when growing annual plants.
4K - This is a Full Spectrum light good for all stages of growth.
6K - Popularly used for vegetative growth and 3K - 2K; consistently used for flowering and fruiting growth.
Why Ceramic Metal Halide (CMH) Full Spectrum light output so special?
Lumatek CMH technology uses ceramic-discharge metal halide lamps to produce a light spectrum that is much broader than other forms of HID lighting (like typical metal halides and HPS). Its output is more similar to the light produced by LEP (light emitting plasma) units. LEPs actually have a slightly broader spectrum than the CMH technology, but they simply do not compare in terms of brightness. It is apparent with the naked eye, as soon as you turn on these Lumatek units, that it is every single bit as bright as the equivalent wattage in HPS, resulting the best of two worlds – a unit that delivers a broad LEP-style spectrum together with the intensity and flare of equivalent HPS-style bulbs. More light, Less heat, Optimal control, More Yield.
Importance of CRI?
The color rendering index (CRI), sometimes called color rendition index, is a quantitative 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. Light sources with a high CRI are desirable in color-critical applications such as photography and cinematography, and even horticulture. It is defined by the International Commission on Illumination as follows:

Color rendering: Effect of an illuminant on the color appearance of objects by conscious or subconscious comparison with their color appearance under a reference illuminant

The highest possible CRI is 100, which is equivalent to natural sunlight. The higher the CRI, the better quality of light.
Why do you offer different kinds of Metal Halide lamps?
There are different metal halides lamps because each lamp represents a Kelvin rating or color. Kelvin ratings over 5,000 Kelvin are identified as "cool colors" (blues & whites). Lower color temperatures (2,700 - 3,000 Kelvin) are referred to as "warm colors". We offer spectrum selections of 4K (Daylight), 6K (Blue Cool). For the CMH range 3100K and 4200K. HPS lamps can be used as a "warm color" spectrum.
Why is my Lumatek E-ballast 20% brighter than my old magnetic ballast, but my friends Lumatek is only 15% brighter than his old magnetic?
This is because of the powerful effect voltage has on magnetic ballasts. A 240v magnetic ballast is designed to work with 240v. At 240v the lamp power (power provided to the lamp) for a 600w ballast is 600w. However, for example, in reality, the UK voltage range is anywhere from 215v to 258v in our experience. Because "Power = Current X Voltage" in a device like a magnetic ballast (a linear device), when voltage changes, so does the power of the ballast and therefore the light it produces. When voltage drops a mere 20v from 240v to 220v a magnetic ballast will typically dim by 20%, leaving the Lumatek 20% brighter. At 210v the Lumatek is 30% brighter. The Lumatek is a voltage regulator and will respond with the same light output over its entire voltage range. Always the same light output, every minute of the day. So the simple answer is: it depends where you are and what your voltage is.
My magnetic ballast is brighter at certain times of the day, why is that?
This is because voltage varies throughout the day. It is not uncommon for voltage in a household to vary by 10% over a day. This is because voltage drops as more "load" (electricity consuming devices) is added to the household circuit, and the larger local electricity supply. As large industrial users turn on, local voltage drops, thereby dimming local lights. This effect occurs even as more HID lights are added to a circuit in a building. We have all noticed house lights suddenly dropping at certain times of the day.
I used to get 6 x 600w magnetic ballasts on my circuit before tripping the circuit breaker. I can now get 7 Lumatek 600w E-Ballasts on that same circuit. How can that be possible?
This is because of the high "power factor" of a Lumatek E-Ballast. Without getting too technical, when a device has a low power factor, the electricity company has to supply additional power to the device to compensate. Because of the way electricity companies bill you, this extra power is not measured by a power meter but is "felt" by the circuit breaker. Therefore an additional almost 10% of power is supplied by the company causing it to "trip". Therefore where six magnetic ballasts would work before, now seven Lumateks will.
When I checked my magnetic ballast with a power meter it told me the ballast was drawing far more than 800w, for a 600w ballast that's not possible surely?
I am afraid it is, using "Power = Current X voltage" we see that at voltages above 255v (quite common in parts of the UK) a 600w Ballast will in fact be drawing more than an 800w ballast! If you have ten of those you can imagine the effect on power consumption.
If my magnetic ballast changes power, does that affect the PAR light my lamp produces?
Obviously the amount of PAR light available has an effect on the growth of plants. PAR is the part (frequency) of light that plants use to grow. Lamp manufacturers design their lamps to produce a certain amount of PAR over the power range of the lamp. For a 600w lamp a range of 585w to 660w of lamp power produces normal PAR as designed. As the lamp power goes above or below that range then the frequency of light it produces changes: more to the blue spectrum when overpowering and more to the red when underpowering. This has an effect on the growth rate and development of plants. If you stay within the range (585w to 660w ) there is not much difference, but obviously overpowering your light does cost more energy. Though you strive to have the optimal light every time there are circimstances when you delibetrately may want to dim your light, such as too high temperatures. The light colour changes more to red, but that effect is less dramatic for the plants than the high temperature is. For those purposes we developed dual power (600/400 W and 400/250 W) dimmable ballasts.