Lightsome
Lightsome (līt"sum) , adjective
1.
Having light; lighted; not dark or gloomy; bright.
White walls make rooms more lightsome than black.
2.
Gay; airy; cheering; exhilarating.
That lightsome affection of joy.
Happiness may walk soberly in dark attire, as well as dance lightsomely in a gala dress.