One thing that i'm always struggling is the how to choose my lightings.
Not the design, silly.. but the light bulb. I know i will want LED lights, but the wattage sometimes confuses me, as in how bright does a watt gives me and such.
So i'm compiling the info here for my reference again:
Wattage measures power whereas Lumens measures light output.
A 7W LED will produce more light than a 7W fluorescent light.
As a very rough estimation,
For fluorescent lights (CFLs): multiply watts by 100 to get an LED lumen(lm) value.
For incandescent bulbs: multiply watts by 10
So in the case of LED bulbs, a 6.3w LED bulb will feel like a 40w incandescent bulb with 400 lm:
80-90 lm 200 lm 400 lm 600 lm 1000 lm
source: Ikea
Here is an estimate for LED wattage selection:
source: HomeDesign
How much Lumens do i really need for a room?
As a general rule of thumb:
Floor: 20 Lumens/Sqft or 215 lm/sqm
Tables and raised surfaces: 30 Lumens/Sqft or 323 lm /sqm
Desk and Task lighting: 50 Lumens/Sqft or 538 lm/sqm
If possible, get dimmer switches so that if it's too bright, you can still adjust accordingly
Dimmable non-dimmable
Not the design, silly.. but the light bulb. I know i will want LED lights, but the wattage sometimes confuses me, as in how bright does a watt gives me and such.
So i'm compiling the info here for my reference again:
Wattage measures power whereas Lumens measures light output.
A 7W LED will produce more light than a 7W fluorescent light.
As a very rough estimation,
For fluorescent lights (CFLs): multiply watts by 100 to get an LED lumen(lm) value.
For incandescent bulbs: multiply watts by 10
So in the case of LED bulbs, a 6.3w LED bulb will feel like a 40w incandescent bulb with 400 lm:
80-90 lm 200 lm 400 lm 600 lm 1000 lm
source: Ikea
Here is an estimate for LED wattage selection:
Watts (Power) |
Average Lumens (Brightness) |
Use this for |
3W | 200 | Candle Bulbs, Lamp shades. Because its not that bright, often use for close lighting. |
5W | 300 | Downlights. Common colour-changing bulbs. |
6W | 400 | Quite common. Bedrooms, corridors. |
7W | 460 | Accent lighting. Bedrooms slightly more bright. |
12W | 800 | Less common. Very high ceiling downlights. Or where a lot of light is required. |
source: HomeDesign
How much Lumens do i really need for a room?
As a general rule of thumb:
Floor: 20 Lumens/Sqft or 215 lm/sqm
Tables and raised surfaces: 30 Lumens/Sqft or 323 lm /sqm
Desk and Task lighting: 50 Lumens/Sqft or 538 lm/sqm
Area | Lumens/Sq M |
---|---|
Kitchen | 300-400 |
Kitchen (Task) | 700-800 |
Living Room | 400-500 |
Hallway | 300 |
Bedroom | 300-400 |
Bedroom (Task) | 700-800 |
Bathroom | 500-600 |
Bathroom (Task) | 700-800 |
Reading Area | 400 |
If possible, get dimmer switches so that if it's too bright, you can still adjust accordingly
Dimmable non-dimmable