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MR16 Bulbs


MR16 Light Bulb FAQs

What Are MR16 Bulbs?

MR16 bulbs, sometimes called GU5.3 light bulbs, are commonly used around the home in downlights. They use multifaceted reflectors that concentrate light beams and project them to the room, creating well-lit environments. MR16 light bulbs can come in various wattage, lumen, and colour temperatures. They’re commonly available as LED lights, providing a low voltage and energy-efficient bulb option suitablefor all kinds of homes. But you can also find them with halogen lights.

Are All MR16 Bulbs 12v?

No, not all MR16 bulbs are 12v. Although MR16 bulbs are interchangeably called GU5.3 light bulbs, this is only fully accurate when they have the GU5.3 base. Some MR16 light bulbs can use the GU10 base. The GU5.3 base uses 12 volts, and the GU10 uses 120 volts.

Can I Replace MR16 Halogen Bulbs With LEDs?

Yes, you can replace MR16 halogen bulbs with LEDs. However, you might have to change your transformer. MR16 halogen bulbs are low voltage, and most power supplies require a minimum 20-watt load. We recommend using an electrician if you need to change any electrical units.

Is MR16 the Same as GU5?

The MR16 light bulb is commonly called a GU5.3 light bulb, as it uses the GU5.3 “push-fit” base with two sharp pins at the bottom. But technically, they’re not the same thing. GU5.3 refers to the cap/base, while the MR16 is the shape of the bulb. Not all MR16 bulbs use the GU5.3 base and can sometimes use the GU10.

Are MR16 Bulbs AC or DC?

MR16 LED bulbs can be either AC or DC. Bulbs with AC are designed to work with existing halogen transformers. But if it’s DC, you’ll need an LED driver when replacing an MR16 halogen bulb with an LED.

Are MR16 Bulbs Being Phased Out?

MR16 halogen bulbs were phased out in 2016 as they didn’t comply with new EU legislation due to the CO2 they produced. You can replace your old halogen bulbs with MR16 LED bulbs.

Are MR16 LED Bulbs Dimmable?

Not all MR16 LED bulbs are dimmable. But there are dimmable options available. However, dimmable MR16 LED bulbs are known to be unreliable compared to the GU10.

Can I Replace MR16 With GU10?

Yes, you can replace MR16 bulbs with GU10. But it can be complicated as you will need to switch the bulb's transformer. We recommend talking to a qualified electrician.

Do MR16 Bulbs Need a Transformer?

MR16 LED bulbs require a step-down transformer from line voltage to 12v AC/DC. They can either use a magnetic or electronic transformer to power the lamp.

What is the Difference Between MR11 and MR16?

There’s a size difference between MR11 and MR16 bulbs. The MR11 is smaller, with a diameter of 35mm. The MR16 has a diameter of 50mm. This means MR11s aren’t as bright as MR16s but allow for smaller holes in ceilings for downlights.
  • Original price £1.99 - Original price £1.99
    Original price
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    £1.99 - £1.99
    Current price £1.99 inc VAT
    £1.66 ex VAT

    Newlec DIM MR16 20 840 Lamp Reflector LED MR16 50mm Dimmable 3W 4000K 230lm 12V

    Newlec
    In stock

    LED MR16 provides energy efficient direct replacements for standard halogen lamps. Wide beam angle ideal for general area Lighting whilst the warm ...

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    Original price £1.99 - Original price £1.99
    Original price
    £1.99 inc VAT
    £1.99 - £1.99
    Current price £1.99 inc VAT
    £1.66 ex VAT
  • Original price £1.40 - Original price £1.40
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    £1.40 inc VAT
    £1.40 - £1.40
    Current price £1.40 inc VAT
    £1.17 ex VAT

    Philips 42516460 TH MR16 GU5.3 Lamp 50W 12V

    Philips
    In stock

    Lamp Tungsten Halogen GU5.3 50W 12V CLR MR16 REFLECTOR 36DEG

    Original price £1.40 - Original price £1.40
    Original price
    £1.40 inc VAT
    £1.40 - £1.40
    Current price £1.40 inc VAT
    £1.17 ex VAT
  • Original price £12.46 - Original price £12.46
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    £12.46 - £12.46
    Current price £12.46 inc VAT
    £10.38 ex VAT

    Tungsram 40401 Cmh20/Mr16/Uvc/830/Gx10/Fl 20W MR16 Precis

    Tungsram
    Out of stock

    Cmh20/Mr16/Uvc/830/Gx10/Fl 20W Mr16 Precis

    Original price £12.46 - Original price £12.46
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    £12.46 inc VAT
    £12.46 - £12.46
    Current price £12.46 inc VAT
    £10.38 ex VAT
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  • Original price £9.50 - Original price £9.50
    Original price
    £9.50 inc VAT
    £9.50 - £9.50
    Current price £9.50 inc VAT
    £7.92 ex VAT

    Newlec MLED10GU532724U Pro 10W LED MR16 Spotlight Lamp Bulb 12V GU5.3 2700K 36° Dimmable Warm White

    Newlec
    Out of stock

    Colour: Warm White • Size: 50.3x54.5mm • Output: 10W • Colour Temperature: 2700K • Voltage: 12V

    Original price £9.50 - Original price £9.50
    Original price
    £9.50 inc VAT
    £9.50 - £9.50
    Current price £9.50 inc VAT
    £7.92 ex VAT
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  • Original price £0.66 - Original price £0.66
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    £0.66 - £0.66
    Current price £0.66 inc VAT
    £0.55 ex VAT

    Philips 6649ECON Lamp Tungsten Halogen GU5.3 MR16 Reflector 24DEG 50W 12V 300

    Philips
    Out of stock

    Original price £0.66 - Original price £0.66
    Original price
    £0.66 inc VAT
    £0.66 - £0.66
    Current price £0.66 inc VAT
    £0.55 ex VAT
    Sold out
  • Original price £9.50 - Original price £9.50
    Original price
    £9.50 inc VAT
    £9.50 - £9.50
    Current price £9.50 inc VAT
    £7.92 ex VAT

    Newlec NLMR168W827D 8W LED MR16 Lamp Bulb [50W Equivalent] GU5.3 Dimmable 12V 36° 2700K 220lm Warm White

    Newlec
    Out of stock

    The new LED MR16 range provides energy efficient direct replacements for the 20W, 35W and 50W standard halogen lamps. • Colour: Warm White • Corr...

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    Original price £9.50 - Original price £9.50
    Original price
    £9.50 inc VAT
    £9.50 - £9.50
    Current price £9.50 inc VAT
    £7.92 ex VAT
    Sold out
  • Original price £3.81 - Original price £3.81
    Original price
    £3.81 inc VAT
    £3.81 - £3.81
    Current price £3.81 inc VAT
    £3.18 ex VAT

    Newlec NLMR1634W827 3.4W LED MR16 Lamp Bulb [20W Equivalent] GU5.3 Non-Dimmable 12V 36° 2700K 220lm Warm White

    Newlec
    In stock

    The new LED MR16 range provides energy efficient direct replacements for the 20W, 35W and 50W standard halogen lamps. • Colour: Warm White • Corr...

    View full details
    Original price £3.81 - Original price £3.81
    Original price
    £3.81 inc VAT
    £3.81 - £3.81
    Current price £3.81 inc VAT
    £3.18 ex VAT
  • Original price £4.90 - Original price £4.90
    Original price
    £4.90 inc VAT
    £4.90 - £4.90
    Current price £4.90 inc VAT
    £4.08 ex VAT

    Newlec NLMR1634W830 3.4W LED MR16 Lamp Bulb [20W Equivalent] GU5.3 Non-Dimmable 12V 36° 3000K 220lm Cool White

    Newlec
    In stock

    The new LED MR16 range provides energy efficient direct replacements for the 20W, 35W and 50W standard halogen lamps. • Colour: Cool White • Corr...

    View full details
    Original price £4.90 - Original price £4.90
    Original price
    £4.90 inc VAT
    £4.90 - £4.90
    Current price £4.90 inc VAT
    £4.08 ex VAT
  • Original price £1.90 - Original price £1.90
    Original price
    £1.90 inc VAT
    £1.90 - £1.90
    Current price £1.90 inc VAT
    £1.58 ex VAT

    Newlec NLMR162327D Lamp LED MR16 Dimmable 3W 2700K 230lm

    Newlec
    In stock

    LED MR16 provides energy efficient direct replacements for standard halogen lamps. Wide beam angle ideal for general area Lighting whilst the warm ...

    View full details
    Original price £1.90 - Original price £1.90
    Original price
    £1.90 inc VAT
    £1.90 - £1.90
    Current price £1.90 inc VAT
    £1.58 ex VAT
  • Original price £3.81 - Original price £3.81
    Original price
    £3.81 inc VAT
    £3.81 - £3.81
    Current price £3.81 inc VAT
    £3.18 ex VAT

    Newlec MLED4WGU533036N 12V 4W LED MR16 3000K 36D Non Dimmable

    Newlec
    In stock

    Original price £3.81 - Original price £3.81
    Original price
    £3.81 inc VAT
    £3.81 - £3.81
    Current price £3.81 inc VAT
    £3.18 ex VAT
  • Original price £4.82 - Original price £4.82
    Original price
    £4.82 inc VAT
    £4.82 - £4.82
    Current price £4.82 inc VAT
    £4.02 ex VAT

    Newlec NLLED8 Superbright LED MR16 12V Green

    Newlec
    In stock

    Original price £4.82 - Original price £4.82
    Original price
    £4.82 inc VAT
    £4.82 - £4.82
    Current price £4.82 inc VAT
    £4.02 ex VAT
  • Original price £27.48 - Original price £27.48
    Original price
    £27.48 inc VAT
    £27.48 - £27.48
    Current price £27.48 inc VAT
    £22.90 ex VAT

    Philips 928193005330 35W GX10 MR16 942 25D CDM-R Elite Mini

    Philips
    In stock

    Mini, very high-efficiency Ceramic Metal Halide discharge reflector lamp producingcrisp white sparkling light with high colour rendering MASTERColo...

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    Original price £27.48 - Original price £27.48
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    £27.48 inc VAT
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    Current price £27.48 inc VAT
    £22.90 ex VAT
  • Original price £3.53 - Original price £3.53
    Original price
    £3.53 inc VAT
    £3.53 - £3.53
    Current price £3.53 inc VAT
    £2.94 ex VAT

    Ledvance PMR1635367W Parathom MR16 35 36DEG 2700K

    Ledvance
    In stock

    Original price £3.53 - Original price £3.53
    Original price
    £3.53 inc VAT
    £3.53 - £3.53
    Current price £3.53 inc VAT
    £2.94 ex VAT


MR16 Light Bulb FAQs

What Are MR16 Bulbs?

MR16 bulbs, sometimes called GU5.3 light bulbs, are commonly used around the home in downlights. They use multifaceted reflectors that concentrate light beams and project them to the room, creating well-lit environments. MR16 light bulbs can come in various wattage, lumen, and colour temperatures. They’re commonly available as LED lights, providing a low voltage and energy-efficient bulb option suitablefor all kinds of homes. But you can also find them with halogen lights.

Are All MR16 Bulbs 12v?

No, not all MR16 bulbs are 12v. Although MR16 bulbs are interchangeably called GU5.3 light bulbs, this is only fully accurate when they have the GU5.3 base. Some MR16 light bulbs can use the GU10 base. The GU5.3 base uses 12 volts, and the GU10 uses 120 volts.

Can I Replace MR16 Halogen Bulbs With LEDs?

Yes, you can replace MR16 halogen bulbs with LEDs. However, you might have to change your transformer. MR16 halogen bulbs are low voltage, and most power supplies require a minimum 20-watt load. We recommend using an electrician if you need to change any electrical units.

Is MR16 the Same as GU5?

The MR16 light bulb is commonly called a GU5.3 light bulb, as it uses the GU5.3 “push-fit” base with two sharp pins at the bottom. But technically, they’re not the same thing. GU5.3 refers to the cap/base, while the MR16 is the shape of the bulb. Not all MR16 bulbs use the GU5.3 base and can sometimes use the GU10.

Are MR16 Bulbs AC or DC?

MR16 LED bulbs can be either AC or DC. Bulbs with AC are designed to work with existing halogen transformers. But if it’s DC, you’ll need an LED driver when replacing an MR16 halogen bulb with an LED.

Are MR16 Bulbs Being Phased Out?

MR16 halogen bulbs were phased out in 2016 as they didn’t comply with new EU legislation due to the CO2 they produced. You can replace your old halogen bulbs with MR16 LED bulbs.

Are MR16 LED Bulbs Dimmable?

Not all MR16 LED bulbs are dimmable. But there are dimmable options available. However, dimmable MR16 LED bulbs are known to be unreliable compared to the GU10.

Can I Replace MR16 With GU10?

Yes, you can replace MR16 bulbs with GU10. But it can be complicated as you will need to switch the bulb's transformer. We recommend talking to a qualified electrician.

Do MR16 Bulbs Need a Transformer?

MR16 LED bulbs require a step-down transformer from line voltage to 12v AC/DC. They can either use a magnetic or electronic transformer to power the lamp.

What is the Difference Between MR11 and MR16?

There’s a size difference between MR11 and MR16 bulbs. The MR11 is smaller, with a diameter of 35mm. The MR16 has a diameter of 50mm. This means MR11s aren’t as bright as MR16s but allow for smaller holes in ceilings for downlights.
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