Metal Halide lights have an better lifespan relative to old technology like incandescent lights but they have a short lifespan compared to LED. Typical lifespan values range from 6,000 hours to 15,000 hours before a bulb requires replacement.

How often should you replace metal halide bulbs?

MH (Metal Halide) bulbs need to be replaced every 8 months on a 18 hour on 6 hour off cycle. MH bulbs lose 40% output in a year, so you lose around 40% yield. Problems like the light going on & off with power outages make the life of the bulb even shorter.

Do metal halide bulbs wear out?

In fact, after 20,000 hours of use, an MH bulb will have depreciated twice as much as an HPS bulb. If you use MH bulbs, plan to replace them after 6-10 months of continuous use.

Do metal halide bulbs dim over time?

As mentioned, the expected life of a typical Metal Halide bulb is, at most, 20,000 hours. Some 100 Watt metal halide bulbs advertise their expected life to be around 15,000 hours. And in commercial and industrial settings where you’re likely using much more powerful lights, this drop in lifespan is significant.

How do you test a metal halide lamp?

Check the ballast output with a voltage tester. Turn on the lamp and touch the ends of the tester leads to the lamp electrodes with the bulb in place, then remove the bulb and make the same test. You should get voltage readings in both cases that agree with the output specified on the label.

How do you know if a metal halide bulb is bad?

Usually the lamps will gain a pinkish hue when compared to other lamps in the same system. This is caused when metal vapors in the lamp are expired from heat or burning, and the lack of a particular mixture in the arc tube renders a different color.

What causes a metal halide to go off?

Metal Halide Lamps Normal end-of-life is caused by sodium loss from the arc tube. The lamp may be hard to start. Color may be blue or pink, depending on operating position.

When should I replace my grow lights?

Fluorescent bulbs – including standard and compact types – need to be replaced every six months, as the gas inside diminishes. Newer, more powerful T5 fluorescents hold their power for up to a year.

Why does my metal halide light go on and off?

As a high pressure sodium lamp is burned for long periods of time, its operating voltage tends to increase. When this point is reached, the lamp will exhibit cycling on and off characteristics. This is normal end of life lamp.

When should I replace my LED grow lights?

If you see signs like these and you’ve only had your lamps a few years, it’s definitely time to upgrade your LED grow lights. Don’t just replace your fixtures with the same model. Quality LED lamps should last at least 50,000 hours—that’s 12-15 years of normal growing cycles.

What’s better HPS or metal halide?

HPS is about twice as electrically efficient as metal halide. Photosynthetically Active Radiation (PAR) is what really matters to plant growth, and delivery of usable PAR is better with HPS than metal halide. Metal halides deliver, on average, about 80,000-110,000 lumens per standard 1,000-watt bulb.

Is metal halide good for growing?

Metal Halide (MH) lamps typically emit a white colored light. Traditionally Metal Halide lamps have been used by indoor growers during the vegetative stage of plant growth. They are ideal for growing plants up to the flowering and fruit production stages because they mimic the spring/early summer seasonal sun.

Can you touch metal halide bulb?

Trust me, “keep yoru mitts off Mh bulbs.” The alcohol wipe advice is right on.. The oils and etc on your hands can get on the bulb. This can cause etching and hot spots on the bulb that can cause issues. f you do touch it just wipe the bulb down with some rubbing alcohol on a napkin or paper towel or something.

What voltage does a metal halide ballast put out?

Most metal halide ballasts operate on 120-277V. These are called 4-tap ballasts and they operate 120/208/240/277V. You will also see 120-480V ballast, which is called a 5-tap ballast. These ballasts operate 120/208/240/277 & 480V.

How do you test a ballast capacitor?

The proper test procedure is as follows:

– Disconnect the Metal Halide, High Pressure Sodium or Pulse Start capacitor from the circuit and discharge it by shorting the terminals or wires together. – If the meter indicates a very low resistance then gradually increases, the capacitor does not require replacement.

How does a metal halide lamp work?

To put it simply, metal halide technology works by passing an electrical arc through a mix of gasses, creating light. When the lamp is inactive, the mercury and metal halide salts are condensed inside the inner arc tube. Metal halide lighting features two electrodes –– one on each end of the inner arc tube.

How do I know if my HPS ballast is bad?

Touch the red lead to one of the low voltage feed wires and the black lead to the neutral wire on the transformer. The meter should read between five ohms to 15 ohms. Any higher or lower reading and the ballast is bad.

What does a capacitor do in a metal halide light?

Capacitors are used as a power factor correcting or current regulating device and provide the control necessary to ensure proper lamp and ballast operation. Different wattages, voltages, and ballast types require a variety of different capacitor values.