# Boxlood SD5305020 MR16 5W LED Bulbs, 10 Pack

Boxlood SD5305020 MR16 LED bulbs are supplied as a 10-pack, with a listed 500-lumen output, 6000K cool white colour and 40-degree beam. They are 12V, non-dimmable replacements, so confirm the socket, transformer and fitting dimensions before choosing them.

- [Original product page](https://bargainpostbox.co.uk/product/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [View offer](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Boxlood
- Model: SD5305020
- Category: Home & Kitchen > Lighting
- Price: 21.24 GBP
- Previous price: 24.99 GBP
- Discount: 15%
- Price checked: 2026-11-14T19:39:36.793Z
- Rating: 4.3 / 5
- Reviews: 21

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- 40-degree beam is described as a narrow spotlight beam for directing light at selected areas.
- The listing describes the bulbs as 5W LED replacements for 50W halogen bulbs.
- Manufacturer instructions specify a 12V supply and recommend an LED transformer. These bulbs are not dimmable.

## Pros

- The 10-pack can cover several compatible fittings at once.
- The listed 500-lumen output and 6000K colour suit buyers seeking a cool-white spotlight.
- MR16 shape and GU5.3 base are specified for matching compatible fittings.

## Cons

- Non-dimmable, so these are unsuitable for circuits that require dimming.

## Specifications

### Identity
- Brand: Boxlood
- Model: SD5305020
- Bulb shape: MR16
- Base: GU5.3
- Pack quantity: 10
### Light output
- Light source: LED
- Rated wattage: 5 watts
- Maximum light output: 500 Lumens
- Halogen equivalent: 50 Watts
- Colour temperature: 6000 Kelvin
- Listed light colour: Cool White
- Beam angle: 40 Degrees
- Colour rendering index: 90
- Dimming: NON-DIMMABLE
- Listed lifespan: 13 Years
### Electrical and fit
- Voltage: 12 Volts
- Power configuration: Corded Electric
- Control methods listed: Push Button
- Listed dimensions: 50mm \(Height\) \* 50mm \(Diameter\)
- Usage: Indoor
### Other listing details
- Energy efficiency label: F
- Material: Plastic & Aluminum

## Before you buy

- Transformer compatibility matters: the listing says these bulbs require 12V and recommends an LED transformer. It warns that halogen transformers, or a transformer whose output is below the combined bulb load, may cause flicker. Confirm the fixture can accommodate the listed 50mm height and 50mm diameter. The listing gives a CRI of 90 in its specifications but describes it as 80+ in feature text, and its 13-year lifespan is stated without an operating-hours basis. Check these details against the selected listing if they are important.

## In the box

- 10 MR16 LED bulbs (Included)

## A good fit for

- Buyers replacing MR16 bulbs in compatible 12V GU5.3 fittings who want cool-white, focused light.
- Indoor spotlight use in areas where non-dimmable lighting is suitable.

## Less suited to

- Buyers needing dimmable bulbs.
- Fittings without a compatible 12V LED transformer or insufficient transformer capacity.
- Buyers seeking warm-white light or a wider beam.

## Customer feedback

The available evidence is limited to aggregate ratings, which lean positive but also include some low ratings. That offers only a broad impression and does not explain how the bulbs perform in particular fittings or transformers. Check the 12V transformer requirements and non-dimmable design against your intended installation.

## Frequently asked questions

### Are these bulbs dimmable?
No. The listing identifies them as non-dimmable and says not to use them with a dimmer.
### What transformer do these MR16 bulbs need?
The listing specifies 12V and recommends an LED transformer. It warns that a halogen transformer or insufficient transformer output may cause flicker.
### Will they fit my existing fixture?
Check for an MR16 fitting with a GU5.3 base and room for the stated 50mm height and 50mm diameter. Compatibility with the fixture and transformer is not guaranteed by the listing.
### What colour and beam do they produce?
The listing specifies 6000 Kelvin cool white and a 40-degree beam angle.

## Alternative options

- [GMY MR16 Halogen Light Bulbs 35W 12V, GU5.3 Spotlight Bulb Dimmable, 4000 Hours Extra Long Lifetime, 2 Pin Base 36°Beam Angle, 3000K Warm White Dichroic 6 Pack](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [SCNNC MR16 GU5.3 LED Light Bulb 12V 5W Natural White 4000K, 500LM Non-Dimmable, Equivalent to 5 0W Halogen, GU5.3 MR16 LED Light Bulbs for Ceiling Lights, Landscape Lighting, Pack of 6](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [ETUOLMP MR16 Halogen Bulbs 12V 50W, Durable 6 Packs High Output Halogen Light Bulbs 2 pin GU5.3 Base for Landscape Lights, Track Lights, Ceiling Lights, Desk Lamps, Dimmable, 2700K Warm White](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [Simusi MR16 Halogen Light Bulbs, \(6 Pack\) 12V 50W Gu5.3 Spotlight Bulb Dimmable for Ceiling Light, 2 Pin Halogen Spotlight Bulbs 2700K Warm White](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [Linkind GU5.3 MR16 LED Bulbs, Daylight White 5000K, 12V AC/DC, Pack of 5 \| 5W 520LM, 36°Beam Angle Bi-Pin Base Spotlight Bulb for Track Light, Non-dimmable](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [Nottac MR16 LED Bulbs, 12V 5W Warm White 2700K 38° Beam Angle LED MR16 for Indoor/Outdoor Landscape, Recessed, Track Lighting, GU5.3 Bi Pin Base, 6 Pack](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [SCNNC MR16 GU5.3 LED Light Bulb 12V 5W Cool White 6000K, 500LM Non-Dimmable, Equivalent to 5 0W Halogen, GU5.3 MR16 LED Light Bulbs for Ceiling Lights, Landscape Lighting, Pack of 6](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [GMY 4000 Hours Lifetime MR16 Halogen Light Bulbs 50W 12V Dimmable Spotlights for Ceiling Light, 36° Beam Angle, 3000K Warm White, GU5.3 Base, Dichroic 6 Pack](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [GU10 LED Bulbs Dimmable, 6500K Cool White, 4.9W 50W Halogen Equivalent,10PC \| 345LM, CRI>80, 15,000H Life, 220-240V, No Flicker, Trailing-Edge Dimmer Ready, Ideal for Kitchen & Bathroom Ceiling Lights](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [VIIIVA GU10 LED Bulb B Rated, Warm White 3000K, 565LM Non-Dimmable, 6-Pack \| 38° Narrow Beam Angle, 25,000H Long Lifespan, 3.5W Energy Saving LED Bulb for Recessed Ceiling Home Decorative Lighting](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [SCNNC Halogen Bulb GU5.3 12V 35W MR16 Dimmable 400lm Warm White 2700K \| 50mm Halogen Reflector Lamp, GU5.3 Halogen Spotlights for Track Lighting, Recessed Lighting, Pack of 6](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)
- [Lepro GU10 LED Bulbs A Rated, Cool White 6500K, 590LM,3.3W \(50W Equivalent\) \| 100° Wide Beam Angle, 50000H Long Life, Energy Saving LED Spotlight Bulb for Ceiling, Recessed Lights,Non-Dimmable,Pack of 10](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)

## Add-ons

- [GY GU10 LED Bulb 4.9W 790lm Cool White 6500K Energy Saving LED Bulb, The New UK Energy Efficiency Class B Replaces 80W, 110°Beam Angle Non-Dimmable, 10 Pack](https://bargainpostbox.co.uk/visit/boxlood-sd5305020-mr16-5w-led-bulbs-10-pack)

## Images

![Boxlood SD5305020 MR16 5W LED Bulbs, 10 Pack — 1](https://bargainpostbox.co.uk/i/R3U0yDxEvNdT4HwqRFBrJMMhTZs9Rx5MSS8BZBxTofTbtAqPJft-MiwlocLz5-QRUoG6yVn1-Ub5KLv-pSJ_1M8eqkCK1NykZu2wAziv3pMg-_Fl5Z7DkCnN.jpg)

![Boxlood SD5305020 MR16 5W LED Bulbs, 10 Pack — 2](https://bargainpostbox.co.uk/i/h4OhnYiP9Ak2HhnR0vI0OCKJdha4pNYs515a_r8FID2e3bhneRPGMCtoziXsAw4LcJiY2AXvhkJdOmUrffYv9jwV67qOm3CQI4WZPgjNF36v0I7JaO6mRbxp.jpg)

![Boxlood SD5305020 MR16 5W LED Bulbs, 10 Pack — 3](https://bargainpostbox.co.uk/i/yE3yUIikaChjIxNgnpKHcakDAFqpMcAertIKeTxG7IvjFqco6-GlxXHu3mseYUd3OtPOrytDffyj-Gy_cH1o0iwp0BkoItilAs3tJ-cEN20UM4EgqWpsGx8R.jpg)

![Boxlood SD5305020 MR16 5W LED Bulbs, 10 Pack — 4](https://bargainpostbox.co.uk/i/GtRxS1vok7NrMP_uVHf8wkFsYmhHhLkEe7xv2kGWxR4DTx4EUcBrcO2__LwEKz2Ge-yW49KJGK05CQLXWHsGWv30iN_GZMJOrJ8uj2CM8aio72a2.jpg)

![Boxlood SD5305020 MR16 5W LED Bulbs, 10 Pack — 5](https://bargainpostbox.co.uk/i/V-vwn7JKqZA0jQ9yl35OoIu_YW36qIIEKojprSFZ2Ni4NDHev1RimlTwk1Rc_tkLPtoPlxMiPhAJU0Fvct6nauMaeC5eKHSZFDFKw1SqEFi85ZF2BuCLCQY3.jpg)

![Boxlood SD5305020 MR16 5W LED Bulbs, 10 Pack — 6](https://bargainpostbox.co.uk/i/k_d0GEQmGT7uCZ8DN-xT5sFNWPnHL2AeUx1iKGZGF0fFIyfjEBpDCdJbuQRVjAx-Y75YoURUPiJ_4yITUqUsUuysq0JBBRfJN5F5ZqV1jWQKihZ7PUL_lOZZ.jpg)

![Boxlood SD5305020 MR16 5W LED Bulbs, 10 Pack — 7](https://bargainpostbox.co.uk/i/9Dkpw6T1XOMUlaDZY8ETQqf0PXnE1WiRZiRD4kZtvZVwjK7NQ3_WkJNQE8Apbv3Pu-eQUO-SR6ThK6hIO4vEH6T5YRZg7rzJFrDJfpo8MRe-5GizmavcL-q1.jpg)