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Topic Title: Part L on commercial premises
Topic Summary: T5 lighting
Created On: 06 July 2013 03:59 PM
Status: Read Only
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 06 July 2013 03:59 PM
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Joined: 09 September 2005

Do we have to install the T5 type fluorescents on new installs ? I am trying to price a workshop and he wants 10 6ft fluorescents but I only seem to be able to find 5ft equivalent with the T5 tubes.

Cheers. Gary

Specialised Subject. The Bleedin Obvious. John Cleese
 06 July 2013 11:13 PM
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Joined: 21 November 2008

You should do a lighting design to give the required illumination level and comply with part L. I'm not certain, but I think this is, or soon will be, 60 lumens per circuit watt. Up from 55 lumens per circuit watt. Other changes are made to control factor, daylight no longer being taken into account.

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