We have various lengths of Festoon lighting;
10 metre
20 metre
50 metre
100 metre

They are 240v with a 16amp plug on one end and 16amp socket on the other so they are able to be linked together.  These are also waterproof so can be used outside.

The distance between the lamp holders is 1 metre, the lamps are LED plastic (golf ball) bulbs.

Equivalent of a 40 watt standard light bulb.  We have tried the equivalent of a 60 watt light bulb in them before but personally I think it looked too intrusive but the equivalent 40 watt bulbs are just right.