When you move into your first home, one of the first shopping lists is lights. On the box you will see a number like 3000K or 6500K. That number decides whether a room feels cosy or bright and alert. Here is what it means, in plain words.
The kelvin number, explained
K stands for kelvin. It describes the colour of the light, not its brightness.
- Warm white (about 2700–3000K): soft and yellowish, like an old filament bulb.
- Neutral white (about 4000K): clean and balanced.
- Cool white or daylight (about 5000–6500K): crisp and bluish, like a bright office.
Brightness is a separate number, in lumens. Power use is in watts. A warm bulb and a cool bulb with the same wattage use the same electricity.
Room by room
Bedroom
Warm white helps the room feel calm at night. Add a small bedside lamp so you do not need the main light before sleep.
Living room
Warm or neutral, depending on taste. Two kinds of light help: a main light for cleaning and guests, and a lamp or two for evenings.
Kitchen
Neutral to cool white helps you see what you are cutting and cooking. Put a light under the cabinets if the main light is behind you, so you are not working in your own shadow.
Work-from-home corner
Neutral to cool white, around 4000–5000K, suits many people for focus. Keep the light to the side of the screen to avoid glare.
Bathroom
Neutral white shows true colours at the mirror. Choose a fitting rated for damp areas.
Save money from day one
- Use LEDs everywhere. They use far less power than old bulbs and last much longer.
- Check the BEE star label on fittings where one is given.
- Make the most of daylight. A home with good windows needs fewer lights during the day.
Do not lock yourself in
If you are unsure, buy colour-changeable LEDs for the main rooms. Live with them for a month and see what you like. Your first home is for learning what suits your family.
Planning the rest of your move? Our first-home guide covers the checklist from booking to moving day.
How bright is bright enough?
Brightness is measured in lumens. The number is printed on the box, and it is a better guide than watts. LEDs today often give around 80 to 110 lumens per watt, depending on the product. So a 9 W LED bulb might give roughly 800 to 1,000 lumens. Read the box rather than guessing.
A simple way to plan a room: a larger room needs more total lumens, and a room where you read, cook or work needs more than a bedroom. Rather than one very bright light, spread two or three sources around the room. It reduces shadows and glare.
The electricity bill, worked out
Illustrative arithmetic. A 9 W LED used 5 hours a day for 30 days uses 9 × 5 × 30 = 1,350 watt-hours, or 1.35 units (kWh). An old 60 W bulb used the same way uses 9 units. At an assumed tariff of ₹7 per unit, that is about ₹9.45 against ₹63 a month, for one light. Across 15 lights, the gap is around ₹800 a month. Use your own tariff from your bill.
Another number worth knowing: CRI
CRI stands for colour rendering index. It tells you how true colours look under the light, on a scale up to 100. A higher CRI makes food, skin and clothes look more natural. For kitchens, dressing areas and bathroom mirrors, choose a higher CRI if the box lists it.
Step by step: plan the lighting for your new home
- Walk each room at three times: morning, evening and night. Note where daylight falls and where it does not.
- List what happens in each room: sleeping, cooking, reading, working, watching TV.
- Choose a colour temperature for each room, using the guide above.
- Plan layers: one main light, plus task lights where you work, and a soft light for evenings.
- Check switch positions on the electrical layout. A switch by the bed and at both ends of a passage saves daily annoyance.
- Buy one sample of each type and try it before you buy for the whole home.
Safety and quality checks
- In India, many LED lamps must carry BIS registration under its compulsory registration scheme. Look for the BIS mark with a registration number on the box.
- Use fittings rated for damp areas in bathrooms and balconies.
- Do not overload a single circuit with many heavy loads. Ask your electrician.
- Keep receipts. Many LEDs come with a warranty of a year or more.
Common mistakes in a first home
- Using daylight 6500K everywhere. It can make bedrooms and living rooms feel harsh at night.
- Mixing colours in one room. A warm lamp next to a cool ceiling light looks patchy. Keep one room to one colour.
- Buying by watts. Compare lumens for brightness and lumens per watt for efficiency.
- One central light only. It leaves corners dark and casts shadows on the kitchen counter.
- Forgetting the balcony and entrance. A small light there helps safety at night.
A one-page shopping checklist
- Colour temperature (K) chosen per room
- Lumens on each box checked
- CRI for kitchen and mirror lights
- BIS mark and warranty
- Damp-rated fittings for wet areas
- One sample tried before bulk buying
Words on the box, in plain English
- Kelvin (K): colour of the light, from warm to cool.
- Lumens (lm): how much light the bulb gives.
- Watts (W): how much power it uses.
- Lumens per watt: efficiency. Higher is better.
- CRI: how true colours look. Higher is better.
- Dimmable: works with a dimmer switch. Not all LEDs do, so check before you fit one to a dimmer.
Read these six terms once, and every lighting aisle becomes simple.
A worked plan for a typical 2 BHK
Here is one way to light a two-bedroom home, as an example only. Adjust for your own rooms and taste:
- Living room: one main ceiling light in warm or neutral white, plus a floor or table lamp in warm white for evenings.
- Dining area: a pendant or ceiling light in warm white, hung so it does not shine into eyes.
- Kitchen: one main light in neutral or cool white, plus an under-cabinet strip over the counter.
- Bedrooms: one main light in warm white and a bedside lamp on each side.
- Study corner: a neutral to cool white desk lamp, placed to the side of the screen.
- Bathrooms: a damp-rated ceiling light and a mirror light in neutral white.
- Balcony and entrance: a small outdoor-rated light in warm white.
That is around fifteen lights in all. Using the electricity sum above, switching all of them from old bulbs to LEDs is a clear saving each month, and you will rarely need to replace them.
The short version
Pick the colour by the room's mood, the lumens by its use, and LEDs everywhere for your bill. Try one sample before you buy many. Light is one of the cheapest ways to make a first home feel like yours.
One last tip: keep a note of the bulb type and colour for each room on your phone. When one fails years later, you can buy a matching one in minutes. And if a room never feels right, change the bulb before you change the fitting. It is the cheapest fix there is.