Warm white (2700K to 3000K) gives a soft, golden light that feels cosy and relaxed. Cool white (4000K) gives a crisp, neutral light that suits kitchens, bathrooms and work areas where you need to see detail.
The difference comes down to colour temperature, which is measured in Kelvin (K). This guide explains the scale, what the labels on Australian globe packs mean and which colour to choose for each room.
Quick Facts: Colour Temperature
- Warm white: 2700K to 3000K
- Cool white: 4000K, sometimes called natural white
- Daylight: 5000K to 6500K
- Best for living rooms and bedrooms: 2700K to 3000K
- Best for kitchens and bathrooms: 3000K to 4000K
- Best for home offices and laundries: 4000K
What Is Colour Temperature?
Colour temperature describes whether a light looks yellow, neutral or blue. It is measured in Kelvin, where lower numbers look warmer and higher numbers look cooler.
It has nothing to do with how hot the globe gets. An LED rated 6500K runs just as cool to the touch as a 2700K one.
Kelvin Is About Colour, Not Brightness
Kelvin only tells you the colour of the light, not how bright it is. For brightness, check the lumens and read our guide to what lumens are.
The Colour Temperature Scale
| Kelvin | Common label | How it looks | Best for |
|---|---|---|---|
| 2200K to 2500K | Extra warm or amber | Deep gold, like candlelight | Feature globes, outdoor entertaining |
| 2700K | Warm white | Soft yellow, like an old incandescent globe | Living rooms, bedrooms, dining |
| 3000K | Warm white or soft white | Warm but slightly cleaner | Kitchens, bathrooms, hallways |
| 4000K | Cool white or natural white | Neutral and crisp | Home offices, laundries, task lighting |
| 5000K | Cool daylight | Bright white with a slight blue tint | Garages, workshops |
| 6000K to 6500K | Daylight | Blue-white, like an overcast sky | Workshops, rarely used in living spaces |
What the Labels Mean in Australia
Most globe packs sold in Australia use three labels: warm white, cool white and daylight. Warm white is usually 2700K or 3000K, cool white is usually 4000K and daylight is usually 6000K to 6500K.
Labels aren't always reliable, since brands use them in slightly different ways. When you shop for light globes, always check the Kelvin number printed on the box or listed in the product specs.
Warm White vs Cool White: The Key Differences
Warm white (2700K to 3000K)
- Feels cosy, relaxed and inviting
- Flatters skin tones and timber finishes
- Suits evenings and living spaces
- Can look yellow next to cool light
Cool white (4000K)
- Feels clean, crisp and focused
- Makes detail and small print easier to see
- Suits work areas and task lighting
- Can feel harsh or clinical in living areas
How Colour Temperature Affects the Feel of a Room
Warm light tends to feel calming, so it suits the evening and spaces where you unwind. Cool light feels more alert and focused, which helps in rooms where you work, cook or clean.
Some research suggests bright, cool light late at night can make it harder to wind down. Keeping bedrooms and living areas warm is an easy way to help your home feel calmer after dark.
Best Colour Temperature for Each Room
| Room | Recommended | Why |
|---|---|---|
| Living room | 2700K to 3000K | Relaxed and welcoming |
| Bedroom | 2700K | Soft light for winding down |
| Dining room | 2700K to 3000K | Makes food and faces look good |
| Kitchen | 3000K to 4000K | Clear light for food prep |
| Bathroom | 3000K to 4000K | Flattering but clear for grooming |
| Home office or study | 4000K | Helps you stay focused |
| Hallway and entry | 3000K | Bridges warm and cool rooms |
| Kids' rooms | 2700K to 3000K | Calm light for bedtime |
| Laundry | 4000K | Shows stains and colours clearly |
| Garage or workshop | 4000K to 5000K | Bright, practical task light |
| Outdoor and alfresco | 2700K to 3000K | Welcoming and relaxed |
Living Room
Stick with 2700K to 3000K for downlights, pendants, floor lamps and table lamps. Warm light makes timber, linen and soft furnishings look rich and inviting.
Bedroom
2700K is ideal for ceiling lights and bedside lamps. If you read in bed, a 3000K reading light gives a little more clarity without feeling harsh.
Kitchen
In open-plan homes, 3000K is the safe choice because it blends with warm living and dining areas. If your kitchen is a separate room, or you want sharper task light under the cabinets, 4000K works well.
Bathroom
3000K is flattering for skin and still clear enough for everyday tasks. For shaving or makeup, 4000K vanity lighting with a high CRI globe shows true colours better.
Dining Room
Warm white between 2700K and 3000K makes food look appealing and helps guests relax. Add a dimmer so you can adjust the mood for everyday meals or dinner parties.
Home Office and Study
4000K helps you feel alert and focused during long stretches of reading or screen work. If your office doubles as a guest room, a warm lamp gives you an evening option.
Laundry and Garage
These are working spaces, so 4000K to 5000K gives the clear light you need. It makes it easier to spot stains, sort colours and find tools.
Outdoor and Alfresco Areas
Warm white between 2700K and 3000K looks welcoming and suits gardens, decks and entertaining areas. Warmer light also tends to attract fewer insects than cool white or daylight globes.
Can You Mix Warm White and Cool White?
It's best to keep one colour temperature in each room or open-plan zone. Mixing 2700K and 4000K in the same space can make one light look yellow and the other look blue.
Small differences are fine, such as 2700K lamps with 3000K downlights. Cooler task lighting, like strip lights under kitchen cabinets, also works well when the light source is hidden from view.
Tip: when replacing globes, buy enough for the whole room at once and stick to one brand. Two globes both labelled 3000K can still look slightly different if they come from different makers.
Colour-Selectable and Smart Lighting
Many LED downlights sold in Australia have a small switch that lets you pick the colour temperature on install. These are often called tri-colour or CCT-selectable downlights, with settings like 3000K, 4000K and a daylight option between 5700K and 6500K.
Smart globes go a step further, letting you change the colour from an app or voice assistant. They are handy in bedrooms and living rooms where you want crisp light by day and warm light at night.
What Happens When You Dim LEDs?
Old incandescent globes turned warmer as they dimmed, which is part of why low light feels cosy. Most LEDs stay the same colour when dimmed, but "dim to warm" LEDs shift down to about 1800K to 2200K.
Don't Forget CRI
CRI, or Colour Rendering Index, shows how true colours look under a light on a scale up to 100. For homes, look for CRI 80 or above, and CRI 90 or above for kitchens, bathrooms and wardrobes.
A high CRI makes food, skin and fabrics look natural. It matters just as much as Kelvin when you want a room to look its best.
How to Choose the Right Colour Temperature
Use these steps whether you're changing a globe or buying new lighting for a room. Most fittings take standard globes, so you can choose the colour yourself.
- Decide on the room's main job: relaxing, working or a mix of both.
- Choose 2700K for relaxing spaces, 4000K for work spaces or 3000K for rooms that do both.
- Check the lumens so the room is bright enough.
- Look for CRI 80 or higher, and CRI 90 or higher in kitchens and bathrooms.
- Keep the same Kelvin across each room or open-plan zone.
- Choose dimmable or colour-selectable lights if you're unsure.
Common Mistakes to Avoid
- Using daylight globes in living areas: 6500K can make a lounge room feel cold and clinical.
- Mixing colours in one space: different Kelvin ratings side by side look patchy.
- Judging by the label alone: always check the Kelvin number, not just "warm" or "cool".
- Ignoring open-plan zones: kitchen and living lights in the same space should match.
- Forgetting CRI: a low CRI globe can make even the right colour look dull.
Frequently Asked Questions
Is warm white or cool white better for a bedroom?
Warm white is better for bedrooms, ideally around 2700K. It creates a calm, restful feel and is easier on the eyes in the evening.
Is 3000K warm or cool?
3000K is warm white, but it's slightly cleaner and whiter than 2700K. It's a popular middle ground for kitchens, bathrooms and open-plan living areas.
Is 4000K too harsh for a living room?
For most living rooms, 4000K feels too crisp and can make the space look clinical. Stick with 2700K to 3000K and use brighter lamps if you need more light for reading.
What is the best colour temperature for a kitchen?
Most kitchens suit 3000K, especially when they're open to living areas. A separate kitchen or under-cabinet task lighting can go up to 4000K for sharper light.
What is the difference between cool white and daylight?
Cool white is usually 4000K and looks neutral and crisp. Daylight is usually 6000K to 6500K and has a clear blue tint that suits workshops more than homes.
Is 2700K or 3000K better?
2700K is warmer and cosier, so it suits bedrooms and living rooms. 3000K is slightly crisper, which makes it a good all-round choice for kitchens, bathrooms and open-plan spaces.
What colour temperature is best for outdoor lighting?
Warm white between 2700K and 3000K is best for most outdoor spaces. It looks welcoming and tends to attract fewer insects than cooler light.
Related Guides
- What Are Lumens - How bright your lights need to be
- How Many Lumens for Outdoor Lighting - Brightness for paths, patios and gardens
- How High Should a Pendant Be Over a Dining Table - Height and sizing for dining lights
- Bedroom Lighting Ideas - Soft, layered light for rest
- Kitchen Lighting Ideas - Task and feature lighting that works
