top of page


Updated: Jun 11, 2022

lighting in living room, wattage, lumens, lux levels, colour rendering index, unified glare rating

When you are looking to purchase lights for you home, you would need to consider the different types of lighting needs for each of your rooms. At Yeelight, we believe that your home should be customised to fit your preferences. In this guide, I will be bringing you through the basics of what to look our for, and the common terms you may come across when it comes to picking out your lights.

1. Wattage

Wattage is the amount of power needed to generate energy for your lights. Having a higher wattage would mean that your lights will have greater power to generate brighter lights.

battery converts power into light energy

Do take note that if you are looking to purchase brighter lights, referring to lumens rather than wattage would be helpful to your search.

2. Lumens

Lumens is a measure for brightness. A higher value of lumens would give rise to brighter lights, while a lower value will result in dimmer lights.

comparing the difference in brightness between light bulbs with different lumens

It is good to note that more energy efficient lights can have a lower wattage for the same lumens!

Click here to find out more about lumens!

3. Lux Level

You can think of "Lux level" as the amount of light that actually fills up a room. If you would like more illumination in your home, finding lights with a higher lux level would be ideal. To understand this better, a hospital would require lights of higher lux levels compared to your average home.

DIfference in lux levels results in different areas of which the lights can cover

It is very important to consider the area of your space before purchasing your lights. Typically for an apartment, purchasing lights with a lux level of 150 lx to 200 lx can be a good choice, but ultimately depends on your personal preference.

Click here to find out more about lux levels!

4. Colour Rendering Index

CRI is a measure of how accurate the light source is when it comes to reflecting colours into our eyes, this index is based on a scale of 0 -100, 100 being just like natural sunlight. You can think of it as comparing your lights to the sun!

lamps of high or low colour rendering index varies in term of how the colour of an object looks our eyes

Picture this: when a light with low CRI shines onto a red apple, the colour that you see would be dull rather than a vibrant and accurate red like how natural sunlight would. To prevent such dull representations of colours in your homes, you should ideally look for lights that has a minimum of 80 CRI, but >90 CRI would be ideal.

Here is an example for CRI:

how different colour rendering index results in different colour renders

Click here to find out more about CRI!

5. Unified Glare Rating

UGR measures how glaring a light source is. If you are wondering what a light with high UGR would look like, you can imagine looking at a car's headlights at night.

difference between lights with high and low unified glare rating

Here would be an example of a light with high UGR:

To make sure that your home has a comfortable lighting environment, you should try to get lights that have a UGR of 10 and below.

Here is an example of our comfortable downlights that has low UGR:

how lights of low unified glare ratings may look like. Yeelight by host systems downlights

Click here to find out more about UGR!

Now that you are equipped with these tips, we hope you have a brilliant time hunting for your next il-lumen-ation!

At Yeelight, we are able to assist in providing insights and advice on the correct solution for you. If you would like to know more about what we do and want to enquire more about our services, feel free to make an appointment with us here!

393 views0 comments


bottom of page