Corrosion in connector blocks is the major cause of most Automotive breakdowns.If you have cleaned the corrosion off the connectors correctly and you reverted to the original bulbs you should be fine or as per other post/s lower current draw LED bulbs will put less strain on the connector but electrical block servicing is as important as any other from of servicing on Automotive vehicles.
Get yourself a can of ACF50,
http://www.acf-50.co.uk/motorcycle.htm
and treat all your connectors/bulb holders with it once you have removed corrosion.
https://www.amazon.co.uk/ACF-50-Moto...keywords=acf50
It may appear expensive but it lasts for ages as you only need to use it sparingly.I also use it on my Rad hoses as it stops them decaying along with most fasteners on my Bikes.I've been using it close to 15 years now and never had a connector that has been treated with it burn out.