I bought nearly all my lighting from Aten 6 years ago when I did my conversion.A reading light failed about 2 years ago and i contacted them to buy a replacement as I had another 3 in van ,they sent me a replacement free of charge,not very often you get service like that nowadays.Any light changes i do in The Arto will come from them .Tam used cheap ones from eBay they are OK for the price. I have them from both Amazon and eBay and had part of the strip fail on one others I've found they lose brightness over a few years.
Now I'd rather buy from Aten lighting but they are 30 quid instead of 5 but guaranteed quality.
Cheers Cris .