Ever bought a bulb only to dislike the light it produces? You purchase a bulb, screw it in, switch it on, and instantly hate the color of the light that site. The problem is often color temperature, and that's quite common with LEDs because the number of options is so broad.
The scale is measured in Kelvin, and at about 2,700K, the light is warm yellow, similar to an old traditional incandescent lamp. Around 4000K, the light becomes neutral white. Increase the temperature to 5000K or 6500K, and the light begins to feel cool and blue, similar to the way midday sunlight appears on a cloudless 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 warm and calming, making it ideal for winding down in the evening. Use a higher temperature here and the room can start to feel more like an office environment.
Kitchens and bathrooms are often better with 3500K to 4000K. When you're cooking, you want to make sure you can see everything clearly while chopping ingredients. 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 appearing overly bright.
Home workspaces and garages can benefit from stronger and cooler lighting, typically 5000K and above. This is often described as daylight white. Cooler light can help support concentration when completing tasks and may also reduce visual strain.
Light output is another important factor. Focus on lumen output, not watts. As a rough estimate, around 800 lumens can replace the equivalent of an old 60-watt bulb in many table lamps. Reading areas typically need between 450 and 800 lumens, while a kitchen ceiling might require 1500+ lumens distributed across the entire room.
Another factor that many people forget when switching to LED bulbs is the Colour Rendering Index, commonly called CRI rating. A 90 or higher CRI provides a more accurate appearance for skin, food, clothing, and other materials. LEDs with a low CRI can make red clothing appear muted or brownish.