Are metal halide bulbs toxic?
Exposure to broken metal halide bulbs can result in skin and eye irritation, including photokeratitis, particularly in settings such as sports facilities where balls or other objects are routinely thrown.Mar 25, 2016
What causes metal halide lamps to explode?
What safety issues should specifiers consider? Metal halide (MH) lamps can explode (typically referred to as sudden nonpassive failure) because they operate at high pressures, but some products are manufactured with safety features to prevent injury.
Do metal halide lights have mercury?
All commonly available fluorescent tubes and high-intensity discharge (HID) lamps contain mercury. The most common HID lamps are mercury vapor, metal halide, and high-pressure sodium lamps. Older fluorescent lamps may contain nearly 50 milligrams of mercury per 4-foot-long fluorescent lamp.May 14, 2018
How hot do metal halide bulbs get?
2000 degrees FahrenheitWhen fully lit, the Metal Halide lamp will reach a temperature of 2000 degrees Fahrenheit and operates at a vapour pressure between 70 and 90 pounds per square inch.
How can you tell 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.Jun 27, 2010
Do metal halide bulbs require ballast?
Metal halide (MH) ballasts are required to start the lamp, regulate the lamp starting and lamp operating currents, and provide appropriate sustaining supply voltage.
How long do metal halide bulbs last?
6,000 hours to 15,000 hoursMetal 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.Dec 5, 2017
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. The enhanced blue in metal halide does not lead to increased plant growth compared to HPS in the “veg” stage.Aug 1, 2014
What color temp is metal halide?
With the introduction of specialized metal-halide mixtures, metal-halide lamps are now available with a correlated color temperature from 3,000 K to over 20,000 K. Color temperature can vary slightly from lamp to lamp, and this effect is noticeable in places where many lamps are used.
How long do metal halide bulbs take to turn on?
1 to 15 minutesMetal halide (MH) lamps do not achieve their full light output immediately after starting. Rather, they require a period of time-1 to 15 minutes-to reach 90% of their full light output.
Can I replace metal halide with LED?
Light-emitting diode (LED) technology advancements now allow you to retrofit your metal halide lamps with a simple bulb change. LEDs can give you comparable lumens at a fraction of the energy cost. They are also longer-lived and show a lower reduction of performance over their service life.Oct 22, 2019
What is metal halide?
Metal Halide is "Source Point" lighting meaning that the source of light is coming from a single point as opposed to light spread over a large area like fluorescents produce. You can get an example of the shimmer effect by holding a flashlight over your tank pointing at the sand.
How many inches is a 70/150 light bulb?
imo, 70/150 is good for 16 or less inches. 250W is good for 16 to 24". The more SPS you want, the more likely you'll be able to use a more powerful bulb. A 150W would work on an 18" tall tank if you kept sps near the top, and lower light coral near the bottom. Anything closer to 24" would be better with 250W if you want higher light coral.
Does halide burn coral?
This is true. Halide produces more heat than any other bulb. So much in fact that you cannot put plastic or acrylic as a shield between the bulb and water, it WILL melt or deform it. Halide can increase the temperature of a tank and cause evaporation issues if you're using a large amount of power. You'll see most people hanging it with pendants above the water to reduce the heat and to also not burn the corals by being too close to the water. In most enclosures there are fans to cool the bulb and keep the heat out of the tank but in most cases you'll still see a small increase in temeperature if you're using a lot of halide.
