Ever bought a bulb only to dislike the light it produces? You purchase a bulb, screw it in, turn it on, and immediately hate the colour of the light my ever lights. The problem is often color temperature, and that's particularly common with LEDs because the number of options is so broad.
The scale is measured in Kelvin, and at about 2700K, the light is soft yellow, similar to an old traditional incandescent lamp. Around 4000K, the light becomes balanced white. Increase the temperature to 5000K–6500K, and the light begins to feel cool and blue, similar to the way midday sunlight appears on a clear day.
Both the sleeping area and family room generally work well with soft white at around 2700K-3000K. The softer glow in this spectrum feels comfortable and relaxed, making it well suited for winding down in the evening. Use a higher temperature here and the room can start to feel more like an office environment.
Kitchen and bathroom areas are often better with 3500K–4000K. When you're preparing food, you want to make sure you can see details properly while working at the counter. In the bathroom, you're applying makeup and want to see skin details clearly in the mirror. A neutral white color temperature provides clear illumination without feeling too harsh.
Home workspaces and garages can benefit from stronger and cooler lighting, typically 5000K or higher. This is often described as daylight white. Cooler light can help support focus when completing tasks and may also make detailed work more comfortable.
Brightness is another consideration. Focus on lumens, not watts. As a rough estimate, 800 lumens can replace the equivalent of an old 60W incandescent bulb in many table lamps. Reading areas typically need between 450–800 lumens, while a kitchen overhead light might require 1500+ lumens distributed across the entire room.
Another factor that many people overlook when switching to LED bulbs is the Color Rendering Index, commonly called CRI rating. A CRI of 90+ provides a natural appearance for skin tones, food, and fabrics. LEDs with a low CRI can make red clothing appear dull brown.