What level is Lugia in Pokemon Silver?

In Pokemon Silver, LUGIA is found in the WHIRL ISLANDS at Lvl 40.

In Pokemon SoulSilver, LUGIA is found in the WHIRL ISLANDS at Lvl 45.

In Pokemon Gold, LUGIA is found in the WHIRL ISLANDS at Lvl 70.

In Pokemon HeartGold, LUGIA is found in the WHIRL ISLANDS at Lvl 70.