Halogen Light Bulb Types That You Should Know

There are different types of bulbs: incandescent, halogen, LED, and so forth.

Halogen bulbs are not as great as LEDs, but they are certainly better than the traditional incandescent bulbs. In fact, they improved on incandescent bulbs.

However, even these bulb types have their own different types. Let’s take halogen light bulbs, for instance, and examine the different types of halogen bulbs.

MR8

The MR8s have the least size among halogen spot lights.

MR8s uses a 2-pin GU4 fitting. The GU4 fitting has 2 pins which are 4 mm apart. This fitting is used only by two types of bulbs: the MR8 and the MR11.

The diameter of a MR8 is 25 mm.

MR8s are mostly used in novelty lights. They are also used in the interior of low-voltage vehicles like buses, RVs, boats, and yachts.

MR11

The MR11 is also small, but not as small as the MR8. It’s a bright halogen bulb that uses a GU4 2-pin fitting, the same one used by the MR8.

As mentioned above, the GU4 fitting has 2 pins, 4 mm part.

The diameter of a MR11 bulb is 35 mm.

MR11s are used mostly for track and ceiling spot lighting.

MR16

The MR16 is halogen bulb most widely used. It uses a GU5.3 fitting that has 2 pins.

The GU5.3 fitting has 2 pins that are 5.3 mm apart. The fitting is used in MR16 spot lights.

MR6s have a diameter of 50 mm. They are commonly used for track and ceiling spot lighting. Note that LED replacements are edging out the traditional halogen.

GU10

This is a high-voltage halogen spot light that is largely used in households. It uses a GU10 fitting that has 2 pins.

The GU10 fitting is a twist and lock affair. That means when you are replacing the bulb, you have to give it a twist. Note that halogen bulbs get extremely hot when they are turned on, so if you are replacing one, wait until it cools down.

The GU10 fitting has 2 pins that are 10 mm apart. The fitting is used only in the GU10 light bulb.

The GU10 bulb has a diameter measuring 50 mm. The bulb is mostly used for spot lighting in the home, and in track and rail lamps. It is also used in standing and ceiling lamps.

PAR20

The PAR20 is a common household, screw base, high-voltage halogen spot light. It features a E26 – E27 spiral screw fitting. Handle this bulb with care as it will require a bit of a twist when you are replacing it.

The PAR20 screw fitting measures 26 – 27 mm in diameter and is used in a variety of light bulbs.

The diameter of the PAR20 bulb is 65 mm. The bulb has wide use for home spot lighting. IT is also used in track and rail lamps, and in standing and ceiling lamps.

PAR30

The PAR30 is the larger (than the PAR20) screw base household high-voltage halogen spot light. It too uses a E26 – E27 spiral screw fitting which necessitates twisting when you are replacing it.

The PAR30 screw fitting measures 26 – 27 mm in diameter. This screw fitting is used in a variety of light bulbs.

The PAR30 has a diameter of 95 mm. Like the PAR20, it is used for home spot lighting, standing and ceiling lamps, and track and rail lamps.

T Type Halogen Bulbs

You can get halogen bulbs in a series of different sizes and shapes. They have a coding system which specifies a bulb’s diameter and whether or not the bulb features a built-in dichroic reflector.

T-shaped halogen light bulbs are tubular in shape. They are the most common halogen bulb shape. They do not have a perfectly cylindrical shape. Most of them have 2-pin bases with a variety of pin spacings and pin widths. They may also feature double-ended bases or common bases such as the medium screw base.

T type halogen bulbs feature the letter “T” to indicate their tubular shape, followed by a number which specifies the tube’s diameter.in eighths of an inch. For instance, a T3 bulb is a tubular halogen bulb which has a diameter measuring 3/8ths of an inch.

Other examples of common T type bulbs include T4, T6, T7, T8, and T10. T6 is a tubular halogen bulb with a diameter of 0.75 inches, or rather 6/8 of an inch.

Other bulb shapes are:

  • A: Standard
  • B: Bullet
  • C: Candle
  • F: Flare
  • G: Glove
  • R: Reflector
  • S: Sign

Final Verdict

Have you ever wondered what codes like GU4, GU53. MR11, and so forth meant? Well, now you know. All these are different types of light bulbs.

As you have seen, different bulb types use different fittings and are ideal for different applications.

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