Try grow lights. Here in the us we have options for PAR38 grow lights less wattage. BRS completed some recent testing.
http://www.bulkreefsupply.com/video...-best-refugium-light-and-what-is-coming-next/
I use them on my 330 gallon and macro is growing so much I have to trim once a week. (somewhat a pain).
http://www.bulkreefsupply.com/video...-best-refugium-light-and-what-is-coming-next/
I use them on my 330 gallon and macro is growing so much I have to trim once a week. (somewhat a pain).