Thanks for all the kind advice and sharing!!
But I'm unfamiliar with those jargon. Is my below interpretation correct?
A) Lux = lm = lumen ? If I need 800 lumens, I can either pick a bulb with 800 lumens, or 2 bulbs with 400 lumens each?
B) E27 is the bulb that we can easily screw them using bare hand? and easy matching the holder?
C) Higher lumens will be required for area which one wanted to see thing clearer, such as study room?
QUOTE(frostier @ Nov 19 2015, 02:02 PM)
Depending on the brightness you need. Elderly needs more lights where as im used to have minimal light at home. Just so it is rather cozy.
Go for E27 screw type of bulb if you have no confident in certain brand. You can change the bulb anytime rather confined to a certain fixture.
Zhaga compliant fixtures has yet to be taken momentum and will take a while before all the component can be interchangeable
QUOTE(codeiki @ Nov 19 2015, 07:39 PM)
General guide that i used
Location Illuminance (lux)
Living room 50
Bedroom 50
Reading room 150
Hall/landing 150
Study 300
Kitchen 300
Outdoor entrances 30
Corridors 100
Restaurant 100
Entrance hall 150
Stairs 150
Public house bar 150
Casual assembly work 200
Rough/heavy work 300
Filing room 300
Classroom 300
Medium assembly work 500
General office work 500
Shop counter 500
Supermarket 500
Laboratory 500
Kitchen 500
Computer room 750
Drawing office 750
Fine assembly work 1000
Precision work 1500
Can't remember the source d.
QUOTE(codeiki @ Nov 19 2015, 07:45 PM)
1 lux = 1 lm/m2
i read in my bedroom, so my bedroom brightness is about the same as study room when turning on all the lights
total lm = 300 lux (study room) * bedroom size in m2 (22.84)
total lm = 6851
if you planning to get an even light in every corner probably 6 bulbs and each about 1141lm..
It's a rough guide i used to follow
QUOTE(codeiki @ Nov 19 2015, 08:06 PM)
You can select a range of brightness that you needed. Let say bedroom, most other time is about 50 lux
total lm = 50 lux (bedroom)* bedroom size in m2 (22.84)
total lm = 1142
So the bedroom brightness is range from 1142- 6851lm
Then you can put switch to turn on number of bulbs you need. 1 switch for 2 bulbs, you will get about 100 lux (1 switch on), 200lux (2 switch on) and 300 lux (3 switch on)