LED vs halogen outdoor wall lights: which is best?

The fundamental difference comes down to how each technology produces light. Halogen bulbs pass electrical current through a tungsten filament inside a halogen gas envelope, generating intense heat as a by-product. That heat is largely wasted energy — only around 10% of the power consumed actually becomes visible light.

LEDs (light-emitting diodes) work differently. They pass current through a semiconductor, which produces photons directly. This process is far more efficient, converting roughly 80–90% of energy into usable light. For outdoor wall lights, this matters because fittings are often left on for extended periods — security lighting, porch lights, and pathway illumination can run for eight or more hours a night.

Many homeowners researching outdoor wall lights are surprised to learn that a 10W LED can produce the same lumen output as a 50W halogen. That's a direct reduction in electricity consumption without any sacrifice in brightness. The Terba Outdoor Wall Lamp (£114.00) is a good example of a modern fitting designed with LED efficiency in mind, offering IP44 weatherproofing alongside a clean, contemporary profile suited to most UK exteriors.

Running cost is where the LED advantage becomes most tangible. Take a typical porch light running for eight hours a night, 365 days a year. A 50W halogen in that fitting consumes 146 kWh annually. A 10W LED producing the same brightness consumes just 29.2 kWh. At the UK average electricity rate of around 24p per kWh, that's a saving of roughly £28 per fitting, per year.

For a property with three or four outdoor wall fittings — front door, side gate, rear patio — the cumulative saving quickly justifies the higher upfront cost of LED-compatible or integrated LED fittings.

Halogen bulbs also need replacing far more frequently. A standard halogen GU10 lasts around 2,000 hours; a quality LED equivalent lasts 15,000–25,000 hours. Over a ten-year period, you might replace a halogen bulb ten or more times compared to replacing an LED once, if at all. Factor in the cost of bulbs and the occasional need for an electrician to access awkward exterior fittings — guidance on when professional help is required is available from NAPIT's consumer advice pages — and the total cost of ownership shifts decisively in favour of LED.

Halogen has traditionally been praised for its warm, continuous-spectrum light and high colour rendering index (CRI), typically around 100. This means colours look natural and true under halogen illumination. Early LEDs struggled to match this, often producing a cold, bluish light that felt clinical outdoors.

Today's LED technology has largely closed that gap. Quality outdoor LED fittings now achieve CRI ratings of 90 or above, and warm white LEDs (2700K–3000K) produce a colour temperature almost indistinguishable from halogen. The Meron IP44 Wall Light (£180.72) uses an integrated LED module calibrated to a warm white output, making it a practical halogen replacement without the aesthetic compromise.

One area where halogen still holds a marginal edge is instant full brightness — LEDs from reputable manufacturers also achieve this, but budget LED products can exhibit a brief warm-up delay. For security lighting triggered by a PIR sensor, this is worth checking before purchasing.

For decorative outdoor fittings where the bulb is visible through clear glass — such as the Navi Wall Light (£156.48) with its E27 socket — a warm white LED filament bulb replicates the visual character of halogen almost exactly, while still delivering the efficiency and longevity benefits of LED technology.

For most new installations, LED is the clear recommendation. However, there are scenarios where halogen retains relevance. If you have an older exterior fitting with a GU10 or G9 socket that isn't compatible with LED replacements — some older dimmer circuits and transformers fall into this category — replacing like-for-like with halogen may be the pragmatic short-term solution.

Similarly, some listed buildings or properties subject to planning conditions have restrictions on visible external alterations. In these cases, the specific aesthetic of a halogen bulb (particularly its filament appearance) may be required to match the character of the property. Always check with your local planning authority before making changes to exterior fittings on a listed building.

It's also worth noting that certain specialist outdoor fittings — particularly very low-voltage garden lighting systems installed before 2010 — may be designed around halogen output characteristics. Switching to LED in these systems without checking transformer compatibility can cause flickering or premature failure.

For new builds and modern renovations, building regulations increasingly favour energy-efficient light sources. Technical guidance on lighting in new construction, including requirements around fire-rated fittings, is covered in NHBC's technical updates on recessed lighting, which provides useful context even for wall-mounted exterior applications.

Choosing the right LED outdoor wall light involves more than simply picking a fitting you like the look of. Several technical specifications determine whether it will perform reliably in the UK climate and deliver the light quality you need.

Weatherproofing is non-negotiable. The IP (Ingress Protection) rating tells you how well the fitting resists moisture and dust. IP44 is the minimum recommended for most outdoor wall positions — it protects against splashing water from any direction. Fittings exposed to direct rain or installed near a hose point may benefit from IP65 or higher.

Colour temperature affects the ambience of your exterior. Warm white (2700–3000K) suits most residential settings and feels welcoming at a front door. Cool white (4000K+) is better suited to security or commercial contexts where clinical brightness is preferred over warmth.

Lumen output determines actual brightness. For a front door or porch, 400–800 lumens is typically sufficient. Larger driveways or rear garden areas may benefit from 800–1200 lumens. Avoid specifying fittings purely by wattage — two 10W LED fittings from different manufacturers can produce noticeably different light levels depending on the quality of their LED modules.

Finally, check the fitting's construction material. Die-cast aluminium, as used in the Meron IP44 Wall Light, resists corrosion and holds its finish well in coastal or high-rainfall environments — both common concerns across much of the UK.