Protected arc. MH bulbs with a protected arc have a hardened casing around the arc and can be used in either enclosed or open rated fixtures. They have a smaller neck before it flanges out to allow multiple installation applications.

What is a protected arc tube?

Protected arc. MH bulbs with a protected arc have a hardened casing around the arc and can be used in either enclosed or open rated fixtures. They have a smaller neck before it flanges out to allow multiple installation applications.

What is a protected metal halide lamp?

Protected PS MH Protected metal halide lamps are made for open fixtures and have a tubular piece of glass around the arctube to prevent glass breakage. These are typically called an MP metal halide such as MP170 or MP400 as an example.

What does ED17 mean?

E17 is the base size (intermediate), a little smaller than the standard E26. ED17 is the shape of the bulb. This bulb is a medium base (E26).

Do all metal halide bulbs require ballast?

Like fluorescent lights, metal halides require a ballast to provide high starting voltages and to regulate current inside the bulb during operation. At startup, the ballast (built into the fixture) acts as a step-up transformer to raise voltage several times greater than the 110-220VAC supply voltage.

What’s the difference between mercury vapor and metal halide?

There is no difference between metal halide and multi vapor lamps because both names describe the same form of lamp. Metal halide or multi vapor lamps are a form of the light source that creates light via passing an electric arc through a gaseous mixture of mercury vapor and vapor of some metal halides.

Do metal halide bulbs explode?

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.

Is HPS light for veg or flower?

Ironically, most HID grow light enthusiasts recommend using both MH and HPS grow lights. MH grow lights (metal halide) are suited best for vegetative growth and HPS grow lights are superior for flowering.

Can you use HPS to veg?

In response to the general question, can you use an HPS bulb for veg, the answer is yes.

What is better for veg MH or HPS?

MH grow lights (metal halide) are suited best for vegetative growth and HPS grow lights are superior for flowering.

What is the difference between arc protection and unprotected arc?

The protection around the arc is there to contain the ruptured arc tube in the event of a non-passive end of lamp life. Meanwhile, MH bulbs with an unprotected arc can only be used in enclosed fixtures which would be able to contain a possible ruptured arc tube. The bases of bulbs with an unprotected arc are wider and closer to the wires inside.

What is the difference between MH bulbs with an unprotected arc?

Meanwhile, MH bulbs with an unprotected arc can only be used in enclosed fixtures which would be able to contain a possible ruptured arc tube. The bases of bulbs with an unprotected arc are wider and closer to the wires inside.

What is a protected arc on a halide lamp?

In a metal halide lamp, this arc tube can be either protected or unprotected. MH bulbs with a protected arc have a hardened casing around the arc and can be used in either enclosed or open rated fixtures. They have a smaller neck before it flanges out to allow multiple installation applications.

What is the purpose of arc protection on a light bulb?

The protection around the arc is there to contain the ruptured arc tube in the event of a non-passive end of lamp life. Meanwhile, MH bulbs with an unprotected arc can only be used in enclosed fixtures which would be able to contain a possible ruptured arc tube.