just had a couple of extra tubes to the Juwel plastic flaps, using one of these: http://cgi.ebay.co.uk/HAGEN-GLO-T5-HO-T ... 240%3A1318
Its a quick and simple solution, but make sure you have adequate CO2 also, or else you will just be asking for trouble with the extra lighting.
Those are good too if it fits your tank, these are 100cm long, but they are BIN more expensive, check if they have auctions which always sell cheaper. just remember that you can only use 2 or 4 tubes all at once! it doesn't have dual eletrical cord so you can turn them on in stages, but you can leave two permanently disconnected if you want to, they have a manual switch for each pair.