how many lumens per meter for workshop?

[carpenter1]

how many lumens of light do you need for a workshop per m2 or m3?

 

[gusbs5502]

Hope this helps. See table below extracted from one of the major suppliers of cladding. Please verify this before progressing with final design.

 

[tim@marford]

Hope this helps. See table below extracted from one of the major suppliers of cladding. Please verify this before progressing with final design.

Also consider local *task* lighting and wiring the overheads so you can switch them in groups (every 3rd or 2nd one on the same switch) easily done at the installation stage. Use switches fitted with a neon indicator so you can find it in the dark

 

[carpenter1]

Are those figures per m2?

 

[ARW]

You have lights in the workshop?!

 

[carpenter1]

Not yet, building just being finished.
Would 2 20w led flood lights per bay be enough? Only 40 foot wide

 

[gusbs5502]

Not yet, building just being finished.
Would 2 20w led flood lights per bay be enough? Only 40 foot wide

Are those figures per m2?

Good question to ask. Illuminance is measured in foot candles (ftcd, ft, fcd) which is 1 lumin of light density per square foot under the imperial system. lux is used in the metric SI system. One lux is 1 lumin per square metre.

The table posted earlier from the cladding manufacturer is in lux therefore it is per square metre. The table below, from a typical lighting supplier, is based on recommendations which I think are derived from CIBSE, the Chartered Institution of Building Services Engineers.

Again please do your own final checks before progressing. Hope this helps.

 

[simon-0116]

Not yet, building just being finished.
Would 2 20w led flood lights per bay be enough? Only 40 foot wide

20w flood are equivalent of 250 w spot like over back door on house.
Lots of light led high bays. Or led low bays panels . Cheap hear full 5ft twin strip lights.
Depends on no of hours on a day. Strip cheapest to run for limited hours.
Try local electrical wholesale for a lighting plan for free.

 

[carpenter1]

so a 12m wide shed by 13.7m long is 164m2 ish.
at 300 lux per m2,
so 49200 lm for total area

so a led flood light at 2400lm, would need 20 for the shed

right?
tell me if i am wrong, does look a bit over the top

 

[REStracTORATION]

so a 12m wide shed by 13.7m long is 164m2 ish.
at 300 lux per m2,
so 49200 lm for total area

so a led flood light at 2400lm, would need 20 for the shed

right?
tell me if i am wrong, does look a bit over the top

Seems it to me
If its your own shed 2 abay will do for general seeing
We have them 6ft twin led strip lights in ours and they are fantastic loads of light
Spot lights might be to bright to look always catch your eye kind of light if its a workshop just a thought.

 

[carpenter1]

True, may be 5ft led tubes be best, when is good for them, would need the total fitting.

 

[REStracTORATION]

Local sparky?

 

[fermerboy]

Probably not that relevant,
Just finished putting these up.
50w Led floodlights off of EBAY, mounted 3 facing downwards in a shed about 16-18' wide by about 60-65' long.
Certainly woudn't want any less light level in a workshop, I would have thought that 6 of these type in a 40ft square shed would be a good starting point.
I have been making doors (for same shed) in there in the evenings and its been fine for that.
Hasn't had a roof for 6 years!!!!

 

[PSQ]

Preaching to the choir a bit:
Don't forget that fluorescent tubes 'flash' at 50hz, and can make spinning machinery (lathe, mill, drill etc) appear stationary....

 

[Zebbedee]

Probably not that relevant,
Just finished putting these up.
50w Led floodlights off of EBAY, mounted 3 facing downwards in a shed about 16-18' wide by about 60-65' long.
Certainly woudn't want any less light level in a workshop, I would have thought that 6 of these type in a 40ft square shed would be a good starting point.
I have been making doors (for same shed) in there in the evenings and its been fine for that.
Hasn't had a roof for 6 years!!!!

That along with some strip lights for bench areas etc would look ok

 

[TheTallGuy]

Preaching to the choir a bit:
Don't forget that fluorescent tubes 'flash' at 50hz, and can make spinning machinery (lathe, mill, drill etc) appear stationary....

Not if you use hf battens.

 

[ThickEric]

50w Led floodlights off of EBAY, mounted 3 facing downwards in a shed about 16-18' wide by about 60-65' long.

That looks a great space to work in fermerboy.

Is the trampoline for changing light bulbs ? May not need that so often with LED lights.

 

[Pennine Ploughing]

flood lights tend to throw shadows, I would go for less powerful lights and lots of them all over the places, nothing worse than working in shadows

 

[carpenter1]

@Luxum LED your view?
and what would you recommend

 

[Luxum LED]

@Luxum LED your view?
and what would you recommend

You can use this basic calculation but it doesn’t take account of the luminaire height, also there are other factors to consider.
1. Mounting height: The lux level will change depending on the mounting height of the luminaire.
2. The type of luminaire: Floods have a 120deg spread were as Corn Lamps have 360deg.
3. Lumens per watt: lm/w vary, a Corn lamp produces 110 lm/w were as a flood may only produce 80 this will affect the amount of luminaires required.
4. The building use: This is important to know, especially for close work. You need to put light were you need it.
5. Shadows: It is difficult to eliminate all shadows. Adding two rows rather than one centre will help. You don’t want light over your back if working on a bench.
6. Building colour: wall/roof - light rather than dark colour will improve light reflection and reduce shadows.
7. Pupil lumens: This is interesting and sometimes misunderstood even dismissed by some. This is the actual lumens the eye sees rather than the lumens produced by the luminaire. Each luminaire has a correction factor to allow for this.

How high would you want to site your luminaires and what is building purpose? Do you have a preference of the type of luminaire - Floodlight, Corn lamp, LED Tube, etc.