These bags aren't heavy. They are light bags.

这些包不重，它们是轻的包。

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The doctor advised that he should change the heavy shoes for light ones.

医生建议他把重的鞋换成轻的鞋。

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youdao

Thick walls are extremely heavy, and allow less room for windows and light.

VOA: special.2010.03.31

At the bottom of the light house was big heavy rocks.

VOA: special.2010.05.08

Batteries are bulky and heavy, and for machines that need to be light.

VOA: standard.2010.08.11

The Belfast boxer previously moved up from super middleweight to light heavy after his bruising Commonwealth title defeat by Carl Froch last year.

BBC: Magee to fight Oakey in Belfast

Then we have Brazil, with first quarter sales of cars and light and heavy commercial vehicles up 4.7%, to 852, 000.

FORBES: Auto Sales Burgeoning World Wide

Walking the line between light and heavy, the meal satisfied with the mix of robust (lamb belly) and subtle (turnip soup) flavors.

FORBES: An Inside Look At Wolfgang Puck's New Restaurant At Hotel Bel-Air