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.

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.

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.

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.

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.

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.

For early vegetative growth, fluorescent tubes work well but light loving plants need more light progressively as they get bigger. Generally, High output Grolux and Halide lamps are the most popular although Sodiums work well too. Call the technical line on 0845 345 5172 for more detailed advice.

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.

This process usually takes 2-4 weeks depending on the genetics of the plant you are growing, but a better indicator is when the roots are firmly established in the water and the plant is approx. 6 - 8 inches in height and width.

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.

We have not had any reports of people's blood pressure increasing from ingesting Absorb Plus. But if you're concerned about it, the best thing would be to check with your doctor - since everyone's condition is different. The sodium level in Absorb Plus is set to provide a balanced profile of electrolytes - since many people consume Absorb Plus as their sole food source for several weeks, or months.

Your heart pumps blood through a network of arteries, veins, and capillaries. The moving blood pushes against the arterial walls, and this force is measured as blood pressure. High blood pressure results from the tightening of very small arteries (arterioles) that regulate the blood flow through your body. As these arterioles tighten (or constrict), your heart has to work harder to pump blood through the smaller space, and the pressure inside the vessels grows.

Low pressure is 1 – 10 psi and does not need an external air supply source. Airsleds use a self-regulating blower that automatically adjusts to increases in weight. The system is contained and portable. High pressure is over 10 psi, needs an external air supply source and an air regulator.

Low pressure units emit both UVA & UVB at a lower energy level. Low pressure units are the traditional beds you normally think of when you think of tanning beds. To build your base tan in low pressure units, you'll usually start off with about ? of the recommended maximum tanning time and increase by a minute or two with subsequent visits*. High pressure units give you immediate results. By filtering out the UVB rays (burning rays), you can tan quickly without burning.