We will transferring this domain to the company 'Arklighting Limited', and although nothing to do with us, they also deal with low energy lighting, are very professional and the owner (Mark) seems a jolly good chap. Their current website is www.arklighting.co and their email is sales@arklighting.co
(Note that they have a '.co' domain - a fairly new domain that causes all sorts of trouble for people and we frequently get email meant for them, delivered to us, hence they would be the best owners of this domain.
Kind regards,
Ross