Lux Level with Maintenance Factors

questions regarding the handling of DIALux evo. (features, tools, options, settings)
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lasitha_c
Posts: 6
Joined: Mon Aug 14, 2017 3:13 pm

Lux Level with Maintenance Factors

Post by lasitha_c » Sun Feb 17, 2019 11:13 am

Hi,

Can anyone please clarify below for me?

When we are allowing RMF, LMF, LLMF and LSF to our design, calculated Lux level becomes Low according to these factors.
So when we actually install the light fittings, it takes may be years before all these factors comes into play and actually cause the Lux levels to drop.
So, initially Lux levels at site will be much higher than what is required.
If we don't have a Dimmimg method to reduce the light levels at initial level, aren't we wasting energy as well as some users may find it nuisance due to over designed Lux levels?

What is the recommended operation hours (30000, 50000 Hrs) to chose these factors for our calculation?

Thanks...
Thanks for helping!

64_Richard
Posts: 21
Joined: Wed Aug 02, 2017 7:57 am

Re: Lux Level with Maintenance Factors

Post by 64_Richard » Wed Feb 20, 2019 10:24 am

Is this for a real life project, or college work?

lasitha_c
Posts: 6
Joined: Mon Aug 14, 2017 3:13 pm

Re: Lux Level with Maintenance Factors

Post by lasitha_c » Sat Feb 23, 2019 3:19 pm

Hi 64_Richrd,

This is for a college project. Doing a comparison for LED and fluorescent.
Thanks for helping!

64_Richard
Posts: 21
Joined: Wed Aug 02, 2017 7:57 am

Re: Lux Level with Maintenance Factors

Post by 64_Richard » Mon Feb 25, 2019 7:47 am

Aah, I guessed that.

You should get a better MF for LED.
In that case calculate the MF correctly using valid figures.
To show your concerns, you could incorporate a DALI dimming system in your concept.
This would be easier with LED than fluorescent.
This will enable you to lower the maintained illuminance to what it should be, and also help with daylight harvesting if appropriate.
It will also increase the lamp life.

In the real world, I would discuss the MF levels with the client first.
Maybe a bit of 'engineering out' of any issues would be a good step.

Good luck with your project.

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