what is the advantage of making canoes that are light
Dugout canoe In ancient many dugouts were made from linden wood, for several reasons. First, was abundant in the Paleolthic after the melting of the Weichselian glaciation and readily available. Secondly it grew to be one of the tallest trees in the forests of the time, making it easier to build longer boats. Linden wood also lends itself well to carving and doesn't split or crack easily. It is lighter and therefore boats made from it have a better cargo capacity and are easier to carry, than most other tree types from the European old-growth forests.
LED circuit The simplest circuit to drive an LED consists of a voltage source and two components connected in series: a current limiting resistor, sometimes called the ballast resistor, and an LED. Optionally, a switch may be introduced to open and close the circuit. Although simple, this circuit is not the most energy efficient circuit to drive an LED, since energy is lost in the resistor. More complicated circuits improve the energy efficiency.