Philips Ultra Efficient LED A60 B22, 2700K
- B22 bayonet
- 60 W equivalent
- Warm white 2700K
Ideal for: ceiling lights and lamps in UK homes
💡 Independent guides · updated October 2026
The right bulb,
for every room.
Bulb bases, lumens, colour temperature, dimmers: everything you need to buy the right LED the first time, whether you live in the UK or the US.
- 6practical guides
- 5step-by-step tutorials
- 6rooms in the simulator
🕰️ Clocks go back · 25 October 2026
Clocks go back: set up your lighting room by room
With dark evenings from around 5 pm, it is worth checking each room: roughly 1,800 to 3,200 lumens for a 20 m² (215 sq ft) living room, 2700 K in the bedroom at night, 4000 K on the desk during the day.
Start here
The questions people ask most before buying a bulb.
Bulb bases
B22, E26, E27, E14, GU10, MR16: identify yours in ten seconds.
Lumens vs watts
How many lumens replace your old 40, 60 or 100 W bulb.
How much light per room
Lux, foot-candles and a simple formula, worked out.
Colour temperature
2700K, 3000K or 4000K: which one suits which room.
Colour rendering (CRI)
Why CRI 90 makes food and skin tones look right.
IP ratings
UK bathroom zones and US damp or wet locations.
Dimmable LEDs
Stop the flicker and buzz with the right dimmer.
Replace halogen spots
GU10 and MR16 to LED, and the transformer trap.
A shed with no power
Battery and small solar kits, sized in watt-hours.
🔎
Clear criteria
Lumens, Kelvin, CRI and IP: every tip is tied to how the room is used.
✅
Checked links
Each product points to a live Amazon UK or US listing, checked when we update a page.
Room by room, at a glance
The settings that work in most homes.
| Room | Colour temperature | What matters | Good choice |
|---|---|---|---|
| Living room | 2700K | Several light sources, dimmable | Warm white B22 or E26 bulb |
| Kitchen worktop | 3000–4000K | CRI 90, no shadows on the worktop | LED strip under the cabinets |
| Bathroom mirror | 3000–4000K | IP44 near the basin | IP44 mirror light |
| Bedroom | 2700K or lower | Soft bedside light | Dimmable warm bulb |
| Home office | 4000K | Enough light on the desk | Desk lamp plus ceiling light |
| Hallway | 3000K | Even spacing of spots | GU10 LED spots |
Our current picks
Prices and stock shown on Amazon
Philips CorePro LED GU10 4W, 4000K (10-pack)
- 350 lm, 36° beam
- Dimmable
- Replaces 50 W halogen
Ideal for: kitchen and hallway spotlights
Philips Ultra Definition LED A19, 2700K (8-pack)
- E26, 800 lm
- CRI 95
- Dimmable, flicker-free
Ideal for: living rooms and bedrooms in the US
As an Amazon Associate I earn from qualifying purchases, at no extra cost to you.
Partner link: I may earn a commission at no extra cost to you.