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.

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.

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.

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.

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.

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.

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.

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.

The Halide lights have a very balanced spectrum and are excellent for vegetative growth or leafy plants like lettuce and basil. The Halide lights produce between 65-115 lumens per watt which is a measure of the efficiency of the bulb, or how much light you are producing for the amount of electricity you are using. The Sodium lights produce light that is very bright and concentrated on the yellow to red side of the color spectrum.

High pressure beds allow for a deeper, darker tan. Thereby, increasing the longevity of your tan. The high pressure bed will also build up your base tan faster. Once your base tan is developed, continual tanning in a high pressure bed would require less frequent trips to the salon. Which is a great time saver for that busy on-the-go tanner.

Metal halide lamps typically require between 100 and 200 hours of operation to "burn in." Lamps operated continuously should be powered off and allowed to cool a minimum of once per week. Performance of lamps can vary, even among those from the same manufacturing batch.

The ImagePro will physically fit into the Altman Shakespeare, ETC Source Four , Selecon Pacific, and the Strand SL. At the time of this writing, the following options had been tested: Altman Shakespeare CDM 150 – Fine. Normal lifespan of slide. ETC Source Four HID 150 – Fine. Slide lifepsan increase by approx 20%. ETC Source Four MSD 250 – Too hot. Slides burns out. Selecon Pacific MSR 575 – Fine. Normal lifespan of slide. Selecon Pacific 80v - Fine. Normal lifespan of slide.

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.

You may have noticed that our metal halide light kits are more expensive than other models available online. The reason is that our light sources utilize HQI and electronic ballast technology. Less expensive kits use core-and-coil technology, which causes the annoying "buzzing" sound that you are used to in parking lots.

We are professional trainers who work with clients because it's simply our lifelong passion and labor of love. Many gyms, health clubs, fitness centers and personal trainers entice you into signing up for 8, 12, 24 sessions, sometimes even months of personal training. We are so confident in our approach that we offer pay as you go personal training and you can discontinue at any time.

You and your physician should determine the most appropriate dose of MUSE for you. This will be the lowest effective dose. During the first administration of MUSE your physician will instruct you on how to use the MUSE and monitor your blood pressure or look for signs of low blood pressure. In addition, some lowering of blood pressure may occur without symptoms.

A history of high blood pressure is not an exclusionary condition to use of phentermine; however, blood pressure does need to be under adequate control (e.g., ideally systolic blood pressure <135 mmHg and diastolic blood pressure <85 mmHg) prior to beginning the program. We assess blood pressure at every visit, referring patients back to their primary care doctors for more adequate blood pressure control prior to their continuing in the program in the event it does become too high.