While buying LED light bulbs, you’ll come across some important specifications. And one of them is wattage. To choose the right LED bulb for your needs, you must understand what it means.
In this article, we will dive into the details of LED light bulb wattage. We will explain what does it mean and why it matters. We will also explain how you can measure the energy consumption and cost of lighting a light bulb.
Part 1. What Does Wattage Mean for Light Bulbs?
Wattage represents the rate at which light bulbs consume electrical energy. Higher wattage means high energy consumption and lower wattage means low energy consumption for a given amount of time. That’s the reason people prefer low-wattage light bulbs to reduce their electricity bills.
Part 2. Does Light Bulb Wattage Matter?
Yes, the wattage of light bulbs matters. Because it decides the energy consumption or the bill you will get at the end of the month.
Wattage is also linked to the bulb’s brightness or the amount of light produced, which is contingent on using the same type of bulb. For instance, if you have two same types of bulbs, but one is 50W and the other is 100W. It means that the 100W bulb will produce more light compared to the 50W bulb and will also consume two times the energy for the same amount of time.
Keep in mind that wattage is not the standard measure for brightness. However, it gives you an idea of the brightness when you are comparing the same types of LEDs or bulbs. There are other factors that decide the light a bulb or LED can produce.
Part 3. How Many Watts Does a Light Bulb Use?
The wattage of a light bulb is mentioned on the bulb itself as well as the box.
Suppose you have a 100W bulb. When you turn it on, it consumes 100 joules per second.
If you want to calculate the electricity it uses, you have to do some quick calculations.
You need to know two things to calculate the energy consumption, one is the wattage and the other is the time for which the bulb was turned on.
Let’s say the bulb was turned on for 10 hours, and its wattage is 100W.
Energy Consumption = 100W x 10 hours = 1000Wh (Watt hour)
Electricity Used = 1000Wh/1000 = 1 kWh = 1 unit
That said, if you use a 100W bulb for 10 hours, it will consume one unit.
| Lumens | Incandescent | CFL | LED |
| 200-300 | 25W | 5W | 2-3W |
| 300-500 | 40W | 8W | 3-5W |
| 500-700 | 60W | 12W | 5-7W |
| 700-1000 | 75W | 15W | 8-10W |
Part 4. How Much Does It Cost to Power a Light Bulb?
Let’s calculate it through an example.
You have a 50W light bulb that you use for 10 hours every day.
Energy Consumed Per Day = 50W x 10 hours = 500Wh
Energy Consumed in 30 Days = 500Wh x 30 = 15000Wh
Electricity Used (kWh) = 15000Wh/1000 = 15kWh
If the cost of one unit in your area is 30 cents per kWh, you can easily calculate the cost of powering the light bulb.
Electricity Cost = 15kWh x 0.30 = $4.5
Similarly, you can calculate the cost of lighting any bulb in any area.
Part 5. How to Choose the Right Light Bulb Wattage for Your Needs?
Here are some important factors to consider if you want to choose the right wattage of light bulbs.
Type of Light Bulb
First, you need to decide the type of light bulb you need. You can go with incandescent bulbs, CFLs, LEDs, etc.
However, the energy-efficient option is LED light. It offers excellent brightness and consumes less energy. That said, while going with LEDs, you have to select lower wattage compared to incandescent and CFL.
Brightness Needed
The brightness of light bulbs is measured in lumens. It gives you a better idea of the light it produces. If you are going with LEDs, you can look for suitable brightness according to the number of fixtures.
But keep in mind that if you want more brightness the wattage of the light will also increase.
Fixture Limit
Each light fixture has a certain wattage limit. You have to be within that. Otherwise, it will create excessive heat and create a fire hazard
Here are some recommended bulb wattages for different rooms and applications.
Bedroom: 10-20 W
Living Room: 30-40W
Kitchen: 30-40W
Bathroom: 20-40W
Hallway: 5-10W
Workspace: 30-40W
Part 6. Energy Efficiency and Wattage: Save Money Without Sacrificing Light
If you want to save money without compromising the light’s performance, here are a few important things to consider.
Bulb Type Comparison:
The best option for energy efficiency is LED.
Suppose you want 800 lumens in the area. You have three options
- An incandescent bulb of 60W
- A CFL of 14W
- An LED light of 10W
LED lights have a high energy efficiency. They convert most of the electrical energy into light. Therefore, with less wattage, you can achieve similar results.
Cost Savings Example:
Let’s say you replace a 60W incandescent bulb with an LED light of 10W.
If the light bulb is used 10 hours each day, let’s see the energy consumption and savings.
Incandescent Bulb
Annual Incandescent Bulb Energy Consumption = 60W x 10h x 365= 219,000Wh
Annual Units Consumed = 219,000/1000 = 219 kWh
Annual Cost = 219 x 0.30 = $65.7
LED Light
Annual LED Light Energy Consumption = 10W x 10h x 365= 36,500Wh
Annual Units Consumed = 36,500/1000 = 36.5 kWh
Annual Cost = 36.5 x 0.30 = $10.95
That said, if you switch to LED, you can save 83.33% annually.
Eco-friendly Choice:
Lower wattage translates to a reduced carbon footprint because it consumes less electrical energy. There will be less power demand and fewer fossil oil will be burned. Thus, the carbon footprint will be reduced.
Low Wattage Light Bulbs Recommendation:
If you are looking for low-wattage light bulbs, you can consider Govee Smart LED bulbs. It’s a smart LED, so you can control it with the application.
You can change the color, sync the light with music, and control multiple bulbs together. You can even control the lights through your voice. If you're looking for a low-wattage with higher-brightness bulb for your home, the Govee E26 Smart LED Colored Light Bulbs are your ideal choice.
FAQs about Light Bulb Wattages
Q1: What is the standard wattage for a light bulb?
There is no standard wattage for modern light bulbs. Depending on the type of light bulb and lumens it offers, you can select the wattage you need. However, the standard wattages for incandescent bulbs were 25W, 40W, 60W, 75W, and 100W.
Q2: Does higher wattage mean brighter?
Wattage is not the right measure for brightness. However, if you are considering the same types of light bulbs but with different wattage ratings, higher wattage will offer more brightness.
Q3: How many watts does a lamp use?
A standard lamp uses an LED light in the range of 5-15W.
Q4: What wattage light bulb for a living room?
A light bulb of 15-40W is suitable for a living room, depending on the area.
Q5: What wattage light bulb for a bedroom?
You can use a 10-20W light bulb for a bedroom.
Final Words
Before you select any light bulb, it is important to understand what its wattage means. If you want to save energy, you need a low-wattage and energy-efficient bulb. Not only will you be able to reduce your electricity bills but also reduce your carbon footprint. And if you are looking for a bright and energy-efficient bulb, you can check out Govee Smart LED Bulbs.
