▁houses ▁on ▁this ▁small ▁island . ▁The ▁original ▁rot ating ▁F res nel ▁l ens ▁remains ▁in ▁use . ▁ ▁History ▁The ▁l ighth ouse ▁was ▁built ▁in ▁ 1 8 6 7 ▁and ▁was ▁fully ▁autom ated ▁in ▁ 1 9 7 1 . ▁The ▁ ▁tall ▁round ▁cast ▁iron ▁l ighth ouse ▁is ▁red ▁and ▁the ▁light ▁s its ▁at ▁an ▁elev ation ▁of ▁ ▁above ▁sea ▁level . ▁The ▁continuous ▁white ▁light ▁sh ines ▁all ▁night ▁long ▁and ▁it ▁also ▁has ▁a ▁bright ▁red ▁flash ▁every ▁ 3 0 ▁seconds . ▁The ▁main ▁light ▁has ▁an ▁intensity ▁of ▁ 7 9 , 0 0 0 ▁cand ela ▁and ▁the ▁red ▁flash ▁has ▁an ▁intensity ▁of ▁ 2 9 5 , 0 0 0 ▁cand ela . ▁The ▁l ighth ouse ▁is ▁in ▁operation ▁from ▁ 1 6 ▁July ▁until ▁ 2 1 ▁May ▁each ▁year ; ▁it ▁does ▁not ▁operate ▁during ▁the ▁rest ▁of ▁the ▁year ▁due ▁to ▁the ▁mid night ▁sun ▁in ▁May – J uly . ▁The ▁light ▁can ▁be ▁seen ▁for ▁up ▁to ▁. ▁ ▁See ▁also ▁▁ ▁List ▁of ▁l ighth ouses ▁in ▁Norway ▁ ▁L ighth ouses ▁in ▁Norway ▁ ▁References ▁ ▁External ▁links ▁ ▁Nor sk ▁F yr histor isk ▁For ening ▁▁ ▁Category : L ighth ouses ▁completed ▁in ▁ 1 8 6 7 ▁Category : L ighth ouses ▁in ▁M ø re ▁og ▁R oms dal ▁Category : Å les und <0x0A> </s> ▁Mat ru h ▁is ▁a ▁village ▁in ▁eastern ▁Y