We would like to know the average cost LED GU10 5 watts for homes in Germany.
I suggest you check out the catalogue of BAUHAUS or Conrad. Two leading retailers in this area in Germany. see the following two links:
This link can be useful too:
A quick search on the German language Google pages revealed that prices for LED GU10 5 watt in Gemany ranges from about €5 to €30! There seem to be many variants – so the best page to have a look at is http://www.idealo.de/preisvergleich/Liste/18953129/gu10-5w-led.html
Information provided by my very good friend Dr Chris Thomas, Director Milton Contact Ltd http://www.miltoncontact.com Chris is a specialist in UK-Germany bilateral trade.