In this article we will explain the different types of light bulbs that are commonly used in homes or offices, detailing both their advantages and disadvantages.
Lighting in our spaces has a significant impact on energy consumption, accounting for 18% of lighting costs in homes and up to 30% in offices, reflected in our electricity bills. Choosing the right type of lighting can generate energy savings of between 20% and 80%, depending on our choices.
In the following sections, we'll break down the main types of light bulbs, how to choose them, and key things to consider.
Aspects to consider before knowing the types of bulbs:
- 1. Efficiency, which measures the energy consumption of light bulbs in watts (W).
- 2. The useful life, which refers to how many hours of use we can expect from each type of bulb.
- 3. The color, determined by the color temperature of the bulb technology (LED, halogen, compact fluorescent, etc.), which can emit white or yellowish light.
- 4. On and off cycles. Each bulb has a preset number of cycles it can withstand without decreasing its lifespan.
For energy-efficient light bulbs , a crucial factor is brightness , measured in lumens , which indicates the amount of light emitted. Traditional bulbs, such as incandescent bulbs, used to be measured in watts, but nowadays lumens help to better understand their lighting capacity.
What are lumens?, and how to calculate them
Lumens are the standard unit of measurement in the International System of Units (SI) for luminous flux, that is, the light output emitted by a light source, in this case, a light bulb. For example, a 15W LED bulb can emit approximately 1050 lumens , equivalent to a 65W incandescent bulb.
To calculate the equivalence between watts and lumens, you can use the formula: Actual lumens = number of watts x 70.
Recommended lighting for rooms in the house
To find out how many energy-saving light bulbs you need for each space in your home, it is advisable to calculate the lighting level in lumens per square meter, using the parameter of lux ( lx ), which is equivalent to 1 lumen per square meter.
For example, if a light bulb generates 400 lumens and the room measures 20 square meters, the lighting level will be 20 lx (lux).
These are the recommendations for different spaces in the home:
- Kitchen: For general lighting, 200 to 300 lx is recommended, but in work areas such as the countertop, it is advisable to increase the intensity to around 500 lx.
- Adult bedroom: General lighting should range from 50 to 150 lx. In spaces such as bed heads, a focused light of up to 500 lx is recommended for reading.
- Living room: General lighting can vary between 100 and 300 lx, but for reading or watching television, it is recommended to reduce to 50 lx.
- Bathroom: Around 100 lx is needed in general, but in the mirror area it is ideal to have up to 500 lx for activities such as applying makeup or shaving.
Types of bulbs and tips for choosing them
The market offers a wide variety of light bulbs, each with different characteristics. Below we detail the most common ones:
The best Led bulbs
LED (Light Emitting Diode) bulbs are one of the newest and most environmentally friendly technologies. They do not contain mercury or harmful gases, and their energy consumption is much lower than other types of bulbs.
With a lifespan of approximately 50,000 hours , LED bulbs can generate savings of up to 80% compared to incandescent bulbs. Furthermore, they offer high-quality light in both warm and cool tones and have the added advantage of not getting as hot as other bulbs, making them ideal for any type of use, whether in homes or offices.
The best Eco halogen bulbs
Halogen bulbs emit natural-looking light and turn on instantly. Although their lifespan is approximately 2000 hours , they consume about a third less energy than traditional incandescent bulbs. However, they do emit heat during operation, which may not be ideal for certain applications.
incandescent bulbs
Incandescent bulbs, which generate light by heating a filament, consume the most energy compared to other types. This type of bulb has been phased out of the market since 2009 due to its low energy efficiency and short life cycle. Although they can still be found in some stores, they are no longer recommended due to advances in more efficient technologies.
The best compact fluorescent light bulbs
Compact fluorescent light bulbs, also known as energy-saving bulbs, are an energy-efficient option, offering a lifespan of between 7000 and 10000 hours . Although their technology is more advanced than incandescent bulbs, they have the disadvantage of taking a few seconds to reach their maximum brightness, making them less suitable for high-traffic areas.
What are the characteristics to consider?
When choosing a light bulb, consider the following aspects:
- ignition time: Some bulbs take longer to reach full output, which can be inconvenient in certain rooms.
- Opening angle: The smaller the opening angle, the more light is concentrated on a specific point. This is ideal for focused lighting.
- Useful life: The hours of duration vary significantly between bulb types.
- Shapes: Bulbs come in many shapes (globes, rounds, spirals), and the choice depends on the aesthetic you want to achieve.
- On/Off Cycle: It is important to consider how many times a light bulb can be turned on and off without loss of quality.
- Lumens: The amount of light emitted depends on the number of lumens, the more lumens, the greater the illumination.
With advances in technology, there are more and more options to illuminate our homes in a more efficient, economical and environmentally friendly way. Knowing the characteristics of each type of light bulb will allow you to make the best decision for your home or office, optimizing energy consumption and guaranteeing proper lighting in each space.