Amount of LED downlights in a lounge

[TJC1]

Does any know have a usual spacing for LED downlights? Im normally like to put a good amount (maybe a few to many) But i always work on id rather put to many in with a dimmer than not enough!

Starting a new build tomorrow and customers don't want loads of downlights. The lounge in 7 x 3. They only want to put in 8 JCC V5os. Does any one have a design method or average amount per square meter?

 

[123]

All this lighting design from wholesalers and lighting design software and calcs seems a bit excessive for a simple project like lounge lighting

 

[Toneyz]

All this lighting design from wholesalers and lighting design software and calcs seems a bit excessive for a simple project like lounge lighting

It is only optional most do it from experience using the same type of fittings on previous jobs.

 

[sparksfly]

Hands pointing in the air approx 1200mm space , base it on old 50w output (340 Lumens) singing "We will, we will rock you" stick low tack tape on ceiling so customer can see layout, then re-re-arrange after finding lovely hidden obstacles

 

[Toneyz]

Hands pointing in the air approx 1200mm space , base it on old 50w output (340 Lumens) singing "We will, we will rock you" stick low tack tape on ceiling so customer can see layout, then re-re-arrange after finding lovely hidden obstacles

You've got the idea !!!!

 

[DefyG]

then re-re-arrange after finding lovely hidden obstacles

It’s a new build, shouldn’t be an ‘hidden’ obstacles

 

[andyb]

It's a domestic lounge, not a warehouse or a football pitch. Ask the wholesaller? use design software? contact the manufacturer?
And it's already been designed for you by the client. Why would you want to talk them out of it?
So you fit fewer or more and the client says that's not what I wanted?

 

[telectrix]

err on the side of a bit more light than you (or the customer) think, then fit a dimmer.

 

[R-fur]

I wired a private new build last year, the spec called for 100% downlighters. As I had never done an job like this before I spent a fair amount of time researching this. The best advice I got was to allow 2 meters by 2 meters for each lamp. This seemed to work out ok. I also used down lighters that took GU10 led lamps so that the light level could be varied by using different wattage of lamp

 

[DefyG]

The best advice I got was to allow 2 meters by 2 meters for each lamp.

Assuming 500lms per lamp, that works out at only 125 lumens per sq m. Bit on the low side!

 

[brianmoooore]

In the old days,before the downlight fashion, a long, narrow room like this would have been adequately lit by two 100W pendants, giving a total of about 2400 lumens.
V50s are 600-650 lumens each, so a total of four will match this!
Not quite as simple as that in practice, of course. Just four would look odd, and to get anything like an even spread of light you need to make sure that the 60 degree cones of light from each fitting at least meet each other.
If you fit eight, split them up into two or three switched circuits, taking into consideration things like being able to have lights on over the seating areas, while those near the TV can be off.