At Tokyo Tower, we use two kinds of lights,
the “Landmark Light,” and the “Diamond Veil.”
The lights are normally lit from dusk until midnight.

*While we turn off the Tokyo Tower lights at midnight, we will leave the lights on until dawn from Monday, September 5th, 2016, depending on the circumstances.

*From February 9th, 2019 (Sat.), Tokyo Tower will commence with long term maintenance work on one of illuminations, the "Diamond Veil".
During the maintenance period the "Diamond Veil" illuminations will be suspended;
however, the bright orange illuminations of the "Landmark Light" will light up as normal.
Please take a look at here as well.

Landmark Light

Tokyo Tower's Landmark Light is lit up with 180 light bulbs. "Landmark Light" has two patterns: a "winter version" and a "summer version."The orange lighting that everyone knows is the so-called "winter version."This winter version is used for around 9 of the 12 months in a year. The remaining 3 months use the summer version. Tokyo Tower's Landmark Light "changes its clothes" for the season.
The summer Landmark Light uses silver lights called "metal halide lamps," and their trait is a white tone with a refreshing and cool image. Every year on July 7th, from the night of Tanabata, the lighting changes to the summer-type. The winter Landmark Light brightens up the transparent winter air even more with orange lights called "high-pressure sodium lamps." Every year from the night of October 2nd the lighting changes to the winter-type.

Summer version: July - September

Winter version: October - July