THD or Total Harmonic Distortion is a very complex subject that can go into a lot of detail. In short, the measurement of THD measures the cleanliness of the output signal which is going to the lamp. The lesser or lower the THD%, the higher the quality of the digital signal produced by the components in a digital lighting system, by reducing harmonic distortions added by the ballast. A THD rating of < 1% is considered to be the high end of the scale. This reference applies to high frequency electronic ballasts which generate the THD that the lamp broadcasts. The lamp is literally broadcasting the frequency and any signal noise generated by the ballast. All electronic ballasts have a different level of THD. Some popular e-ballasts are running from 250% to 400% THD! That level of THD is unacceptably high. These THD’s are causing massive problems for the lamp and ballast and are producing huge amounts of signal hash, which translates into poorer light quality.

StartSmart pre-ignitions diagnostic is a safety system of sensors that the ballast cycles through on start up. It detects any conflicts that are present in the system including: open output, ignition failure, end of lamp life, over/low voltage, high/low internal temperature, thermal, overflow current, and short circuit. This safety check system is to help the user identify and eliminate any problems or conflicts in electrical setup.

Yes, the ballast amperage draw will decrease as the ballast is dimmed. Below is an output chart for 240 volts:

240 volt : 600 WATT – 1000 WATT
Input current: 2.625A – 4.375A

Most name brand HPS lamps are compatible with OCL Complete fixtures. We recommend using Pulse-Start metal halides for all electronic ballasts. OCL has a matched fixture and lamp system. We are proud to say that we are the only fixture and lamp manufacturer that harmonically tunes our fixture and lamp sets together for maximum efficiency and the industry’s lowest OUTPUT THD%.

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 (2.700–3.000K) 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. OCL Digital Lamps have been developed for living things; plants, people, reptiles, fish etc. Traditional lamps were made for human vision and relied on peaks of energy for the human eye. OCL understands not all growers can budget four lamps for every fixture, so the “one lamp system” means the 4K can be used for all stages of plant growth if needed. Your plants will get more photochemical reactions with an OCL digital lamp 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.

Look at “regular” glass and you’ll notice a slight green tint (especially when viewing the edges) that becomes more noticeable when the glass is thicker. Often this is not an issue, but in many applications – like indoor gardening and horticulture, where light is required to pass through glass – clarity becomes more important. And that’s where low iron glass is clearly better. Low iron glass is specially made for exceptional clarity, and will not dull or distort the true colors in the color spectrum. Whether it’s referred to as “extra clear”, “water white” or “low iron”, the glass is made to be crystal clear and virtually tint free. What makes low iron glass so pure and sparkling? One of the main ingredients in all glass is silica sand, which has naturally occurring iron oxides. These oxides are what causes the greenish tint in glass. But low iron glass is made from a high grade of silica sand that is almost completely free of iron oxides. By reducing the iron content, you reduce the greenish tint and increase light transmission, brightness and clarity. In fact, low iron glass can have as little as 10% of the iron content of regular glass, allowing it to transmit 91% of the light, compared to 83% for regular glass.
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. Numerically, the highest possible CRI is 100, which is equivalent to natural sunlight. The higher the CRI, the better quality of light.