Hi Kate

Ideally levels should not rise above 50 lux and there should be no UV at all, this is recommended for a period of 3 months only.

All the best

Vicky

Dr Victoria Purewal ACR

Amgueddfa Cymru-National Museum Wales

Department of Natural Sciences

Cathays Park

Cardiff

CF10 3NP

Tel +44 (0)2920 573119

From: The Natural Science Collections Association discussion list [mailto:[log in to unmask]] On Behalf Of Kate Eden
Sent: 18 July 2014 12:57
To: [log in to unmask]
Subject: light levels for exhibiting herbarium specimens

Hello

We would like to loan some herbarium specimens to a small museum in Dunbar for an exhibition about John Muir. Can anyone clarify what the safe level of light exposure is for herbarium specimens exhibited in display cases? ’Fifty lux (intensity) and 10 microwatts per lumen of ultraviolet radiation’ has been suggested. What’s the easiest way to measure this, and for what period of time could specimens safely be displayed at this level(they will be covered out of visitor hours)?

Thanks

Kate

Kate Eden

Herbarium Technician

Royal Botanic Gardens Edinburgh

20A Inverleith Row

Edinburgh

EH3 5LR

0131 248 2820

http://www.rbge.org.uk/

--

The Royal Botanic Garden Edinburgh is a charity registered in Scotland (No SC007983)

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