Depende de quantas falhas tem
A spell’s effect expands in straight lines from the point of origin. If no unblocked straight line extends from the point of origin to a location within the area of effect, that location isn’t included in the spell’s area. To block one of these imaginary lines, an obstruction must provide total cover.
Qual Radiance Doentio modifica com:
The light spreads around corners, ...
Então, o vidro bloqueará o efeito, mas qualquer rachadura nas janelas, lacunas sob as portas, chaminés, dutos de ventilação, etc., permitirá a entrada da luz.