Lighting company Philips has developed an LED lamp that it describes as ‘the world’s most energy-efficient’.

It said the prototype tube lighting LED is twice as efficient as those currently used in offices and industry around the world but offers the same amount of light.

Being able to halve the amount of energy used could bring huge cost and energy savings.

Lighting accounts for more than 19% of global electricity consumption.

The prototype tube lighting produces 200 lumens per watt (200lm/W) compared with 100lm/W for equivalent strip lighting and 15lm/W for traditional light bulbs.

Light-emitting diodes have been around for years.

Traditionally, they have been used as indicators on electrical devices, such as standby lights on TVs. This was because LEDs were available only in red, but recent advances mean that other colours are now available, and the light emitted is much brighter.

White light (used for general lighting) using LEDs can be created via a number of techniques. One example is mixing red, green and blue LEDs.

It is suggested that LEDs can last for up to 100,000 hours, compared with the 1,000 hours of traditional incandescent light bulbs and compact fluorescent lamps’ (CFLs) 15,000 hours.

The technology is also much more energy-efficient, using up to 90% less […]