LED vs Halogen vs Fluorescent vs Incandescent: Which Actually Saves?

"Energy-saving" bulbs, halogens, the good old incandescents and, of course, LEDs – all four bulb types are still found both in shops and in household drawers. Which of them actually saves electricity? Where does each belong, and where should it be avoided? This comparison gives clear answers, based on expert insights from the Lithuanian national broadcaster LRT programme "Vartotojų kontrolė" (Consumer Control) and on our daily practice as lighting professionals.

Bulb types compared: the table

The short answer: for efficiency and versatility, LED has no competition today. But each type's story is worth knowing – it explains why.

LED: the most efficient and versatile

The core of an LED bulb is a semiconductor diode which emits light of a specific wavelength when current flows through it. Electricity is converted into light rather than heat: according to the experts on the LRT programme, an LED bulb warms up to only around 24–25 degrees, while an incandescent bulb gets hotter than boiling water. Low heat means safety, longevity, and the freedom to install lighting where hot lamps would be a risk.

LED's key advantage over other "efficient" technologies is versatility: LEDs work outdoors in freezing weather, in enclosed fixtures, in spotlights and in decorative schemes alike. How to choose a quality LED bulb by lumens, kelvins and CRI is covered in detail in our LED bulb buying guide.

Fluorescent: "energy-saving" only historically

Fluorescent lamps earned their "energy-saving" name when they were replacing incandescents – in that context they genuinely saved energy. But as the experts stress, compared with LED they are no longer economical. Their applications are also limited: without extra protection, gas-discharge technology performs poorly in low, sub-zero temperatures, so they are unsuitable outdoors.

There is a safety consideration too: fluorescent lamps are filled with inert gas and a small amount of mercury. The amount really is small – if a lamp breaks, collecting the shards and airing the room is sufficient – but specialists advise against using them where children play and breakage is more likely. Burnt-out fluorescent lamps must be taken to electronic waste collection points, never thrown into household bins.

Halogen: bright light at a high cost

A halogen lamp is essentially an improved incandescent: halogen gas extends the filament's life and produces a more intense, brighter light. That is why halogens are still used where very intense lighting is needed. But the list of drawbacks is long:

• Heat. As the experts joke: if halogen lamps are fitted in your ceiling, in winter they are most useful to the neighbours living upstairs – most of the energy turns into heat rising upwards.
• Fragile construction. A halogen lamp must not be installed with bare hands: quartz glass reacts to skin oils and contaminants, and a contaminated lamp can simply explode.
• Fixed orientation. For some halogen lamps the manufacturer specifies a permitted mounting position (ceiling or wall) – not every lamp fits everywhere.

Incandescent: why their era is over

An incandescent bulb produces light by heating a tungsten filament – which is precisely why it is the least efficient: most of the energy becomes heat. The bulb's surface gets considerably hotter than boiling water, creating both burn and fire risks. Incandescent bulbs are no longer sold for household use in the EU, yet many homes still keep a stash. If you are wondering whether to "use them up" – economically it simply does not pay: over its short life an incandescent bulb consumes more electricity than several quality LED bulbs cost.

Outdoor lighting: beam angle matters more than power

When choosing outdoor lighting – for a façade, garden or trees – one more parameter matters besides the bulb type: the beam angle. The experts' example: if you only need to light the façade of a house but the fixture radiates in all directions, only a small fraction of the light actually reaches the building – the rest is wasted. The same applies to decorative garden lighting: uplighting a tree with wide-angle optics is inefficient. Directional optics with the right beam angle achieve the same effect with far less power.

Frequently asked questions

Is it worth replacing working halogen lamps with LED?

Usually yes: LEDs consume several times less energy and last far longer, so the investment pays back through electricity bills. When replacing low-voltage (MR16/GU5.3) halogens, check transformer compatibility – sometimes replacing the whole fixture is simpler.

Where should burnt-out fluorescent lamps go?

Only to electronic waste collection points – because of the mercury they must not go into household bins. Collection points are available at most larger retail stores.

Which bulb is best for frequent switching, e.g. a hallway with a motion sensor?

LED – frequent switching has practically no effect on its lifespan, unlike fluorescent lamps, which wear out faster when switched often.

Summary

LED bulbs win in every category that matters: efficiency, lifespan, safety and versatility. Fluorescent and halogen lamps retain only narrow niches, and the incandescent era is over. If you are planning to upgrade the lighting of your home or business premises – browse our LED bulb range or get in touch: we will help you choose efficient, long-lasting light sources for every space.

Source: LRT programme "Vartotojų kontrolė" – expert commentary on lamp technologies, supplemented with practical recommendations from our specialists.