Hi Lynne,
You may want to navigate over to the UKAPS website afilliate as it's a bit more Anglo-centric: Welcome to the UK Aquatic Plant Society :: Index

If you have a canopy and you don't mind DIY you can modify the canopy using Compact Fluorescent bulbs. Of course interpet is a good brand but there are alternatives such as D&D (which is affiliated with Geismann) Lighting T5 | The Aquarium Solution
or you can check the ASL kits The Coral Garden Shop Lighting

Cheers,