Ever bought a bulb only to dislike the light it produces? You purchase a bulb, install it in, switch it on, and immediately hate the colour of the light homepage. The problem is often light 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 2,700K, the light is warm yellow, similar to an old traditional incandescent lamp. Around 4000K, the light becomes neutral white. Move up 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 bedroom and living room generally work well with soft white at around 2700K-3000K. The gentle illumination in this spectrum feels warm and calming, 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 to 4000K. When you're preparing food, you want to make sure you can see everything clearly while chopping ingredients. In the bathroom, you're applying makeup and want to see pores, blemishes, and smudges clearly in the mirror. A neutral white color temperature provides clear illumination without appearing overly bright.
Home offices 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 focus when completing tasks and may also reduce visual strain.
Brightness is another consideration. Focus on lumens, not watts. As a general estimate, around 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 ceiling might require 1,500 lumens or more 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 CRI of 90+ provides a more accurate appearance for skin tones, food, and fabrics. LEDs with a low CRI can make red clothing appear muted or brownish.