Modern light bulbs are more energy-efficient than old incandescent bulbs, especially LED bulbs. For example, LED bulbs use 90% less energy, CFL bulbs use 60-80% less energy, and halogen bulbs use 20-30% less energy than incandescent bulbs. Modern light bulbs last longer too. Incandescent bulbs only last up to 1000 hours (approx. 6-9 months), while a halogen bulb lasts up to 2000 hours (approx. 1 year), a CFL bulb lasts up to 15,000 hours (approx. 10 years), and an LED bulb lasts up to 50,000 hours (approx. 25-30 years). An LED bulb is a low-wattage light bulb that gives off light using light-emitting diodes. This device emits light when electricity passes through it. A CFL bulb (compact fluorescent lamp) consists of a fluorescent coated glass tube filled with mercury vapour and gas. When electricity passes through the tube, invisible ultraviolet light is emitted, reacting with the fluorescent coating to produce visible white light.

Doesn’t work well in low temperatures: this makes them unsuitable for use in unheated rooms or outdoors.There are some exceptions, with some bulbs being called for their bulb or their shape, rather than their cap width, such as G95 bulb.

In the past, old incandescent bulbs displayed their brightness measured in watts. So, a 100W bulb would be brighter than a 60W bulb. But wattage is only a measure of the bulb’s power consumption, not brightness. We've covered the most essential information you need to know before buying light bulbs in this guide. But here are five other things to consider: E10 – an Edison screw, 10mm in diameter. Used in decorative lighting such as chandeliers (also referred to as an MES – miniature Edison screw).

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Very energy efficient: they're energy-efficient because they use LED technology, using up to 75% less energy than traditional incandescent bulbs. The number of spotlights needed for a room depends on the room’s size. As a guide, you will need one spotlight for every 1m2. Place spotlights approximately 0.5m away from the walls and leave a gap of 1m between each light. E12 – an Edison screw, 12mm in diameter. Used in candelabras (also referred to as a CES – candelabra Edison screw).

Money-saving: they’re more expensive to buy, but they’re the cheapest option in the long term. The money saved on energy bills means they can pay for themselves within two months.

The light bulb wattage you need will depend on where the bulb will be used and its purpose. If you simply want to replace an old incandescent bulb with an LED one, you may want to find the lumens equivalent for the wattage of the old bulb. If you are swapping a CFL or halogen bulb for an LED (or vice versa), the equivalent bulb will display the same number of lumens, but the wattage will be different. The number indicates the diameter of the base or the distance between the pins (depending on the bulb type) in millimetres.

There are many benefits to having rechargeable light bulbs in the home, particularly if you live in an area that is prone to power outages. But choosing the right kind of bulb requires careful consideration, weighing up the cost, energy consumption, and how many lumens it supplies. And when looking at the amount of energy they use per year in kilowatts, it's clear to see how their energy savings compare. For example, based on using 20 bulbs for 4 hours per day, in a year, incandescent bulbs would use 1752KW, halogen bulbs would use 1226KW, CFL bulbs would use 438KW and LED bulbs would use 292KW. Turning them on/off for short periods will shorten their life span: these bulbs should be left on or off for a minimum of 15 minutes to extend their life.G4 – a multi-pin (or bi-pin) base with two pins 4mm apart. This is a small and compact bulb used in decorative light fittings. E14 – an Edison screw, 14mm in diameter. Mostly used in lamps (also referred to as an SES - small Edison screw). In contrast, the GE Lighting Rechargeable Light Bulb provides 760 lumens of brightness and emits a soft white glow. It lasts for up to five hours during a power disruption and is a cost-effective alternative to regular 60-watt bulbs.