灯台下暗し。

灯台下暗し。

You can't see the forest for the trees.

灯(あかり)台下(だいか)暗(くら)し。

Akari daika kurashi.

灯 (ひ、とうか、ともしび)

light; lamp; torch

台下 (だいか)

your honor (honour); his (or her) honor (honour)

暗い (くらい)

dark; gloomy; dark (in colour); dull; depressed; dispirited; sorrowful; bitter (as in a dark past); unclear; unfamiliar; unknown

Readings: トウ、ひ、ほ-、ともしび、とも.す、あかり

Meanings: lamp, a light, light, counter for lights

Readings: ダイ、タイ、うてな、われ、つかさ

Meanings: pedestal, a stand, counter for machines and vehicles

Readings: カ、ゲ、した、しも、もと、さ.げる、さ.がる、くだ.る、くだ.り、くだ.す、 -くだ.す、くだ.さる、お.ろす、お.りる

Meanings: below, down, descend, give, low, inferior

Readings: アン、くら.い、くら.む、くれ.る

Meanings: darkness, disappear, shade, informal, grow dark, be blinded