The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement
and you do not always need 3 hr back up either but it is the default time if you cannot justify something else.
Mike.
The three hour duration is desirable as it may not be possible to effect an instant escape from the building. It also assists as anti-panic lighting if the mains fails and people need to stay in the building due to accident or injury or other reasons etc.
Is there a need for schools emergency lighting? The simple answer is YES! (blelighting.co.uk)
Z.
We're making some changes behind the scenes to deliver a better experience for our members and customers. Posting and interactions are paused. Thank you for your patience and see you soon!
For more information, please read this announcement