Yes you can. You will need to change out the ballast, capacitor, ignitor and lamp. However, there are several cautions that must be taken: the metal halide wattage must be within the fixture limitations; the socket position may need adjustment; the reflector may be different or the ballast strapping may not fit properly. Please contact the factory for a specific product.

The difference between these two types of HID (High Intensity Discharge) lights is the color spectrum that is emitted from each. The High Pressure Sodium bulb emits light that is concentrated in the red to yellow side of the spectrum and are weak in the blue-violet end. While the Metal Halide bulb emits light that is very balanced and contains all the energy peaks at wavelengths of the visible spectrum.

Although both types of lighting systems appear very similar, the main difference becomes readily apparent when you turn them on. A Halide system emits a balanced white light similar to the spectrum of sunlight. This type of light promotes vegetative growth. A Sodium system emits a light spectrum and gives off a warmer colored light. This type of light helps stimulate a plant to produce flowers and fruit.

First, what type of natural light are you working with? When supplementing natural sunlight, use a High Pressure Sodium bulb to extend daylight in the early spring and fall. You can also use them on low light cloudy days. When no natural light is available at all, a Metal Halide bulb is most frequently used, , which is a very wide spectrum bulb perfect for indoor growing. Halide lights are excellent for vegetative growth for leafy plants like lettuce and basil.

Metal Halide lamps should be changed at least every 6 to 12 months if you're burning them 18 hours per day. High Pressure Sodium bulbs, burned at 12 hours per day, will last between 6 months and a year and a half depending on the bulb.

In our controlled trials, we found that High Pressure Sodium (versus Metal Halide) when used for an entire crop cycle, slightly but noticeably out performed Metal Halide. We have also found that High Pressure Sodium gives a marginally better yield if it used for the bloom phase and the Metal Halide performs slightly better during growth. Our results would not justify purchasing both the lights for growth and bloom but this may not be the case with all species and strains.

There are a couple of reasons growers switch between bulbs during different stages of plant growth. First, Sodium bulbs can make some plants grow "leggy" and stretched out due to the high yellow to red spectrum they give off. Halide bulbs tend to keep plants "tighter", with less space between internodes.

Yes, That is usually not a problem and I can use white or yellow gold in either 14K or 18K instead of sterling silver. There will usually be a slight difference in the stone size or shape since they are all custom cut for the piece, but I will be glad to discuss this in detail with you. Also, many pieces shown on my site that are made in gold can also be custom ordered in sterling silver. Please contact me .

Yes, you can always upgrade a standalone license to a network license or revert your network license to a standalone.

Although you have cross compatibility between Macintosh and Windows versions of Sequencher, these are two separate software programs so we can not offer an exchange between the two applications.

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Many people switch between bulbs for different stages of growth for a couple of reasons. First of all, Sodium bulbs have been known to make some plants grow leggy and stretched out because of the yellow to red spectrum that they give off. Metal Halides tend to keep these plants tighter with less space between internodes. So some growers use the Metal Halide lights during vegetative growth to keep the structural growth of the plant nice and tight.

Yes you can, but it is a tricky job. Most watch makers will tell you that you should buy a new bezel, because if the insert gets bent while installing the new one, it will put a permanent white line on that bezel insert. If you want to change the color insert, send your watch to an Omega service center near you.

On the "General" tab, use the "Page Type" combo box to select a Heading or a Topic and the changes are made.

Earmuffs are easier to use correctly, and therefore provide attenuation that is much closer to the laboratory derived NRR. Earplugs are hard or sometimes very hard to insert correctly, and therefore often do not provide the same attenuation in the field, as they do in the laboratory. This is the reason that NIOSH recommends different de-ratings for earplugs and earmuffs. You can read more about this subject by clicking on this link.

Yes, the surfaces need to be clean and sound, with all other appropriate application procedures followed.

A: The main reason for choosing a metal seal system is in the level of vacuum that can be achieved. Elastomer seals allow air and other gases to permeate through them faster than through copper, and therefore are restricted to high vacuum applications. Metal seals have lower rates of permeability and can be baked to higher temperatures than elastomers, and are therefore used for ultrahigh vacuum applications.

Gallium and multi-spectrum lamps have cooling requirements fairly equivalent to mercury lamps. Special care is required for iron lamps. If an iron lamp overheats, the iron will irreversibly become part of the quartz tube. This will not cause lamp failure but you will lose the iron portion of the UV spectrum.