The Forecast series by FORUM is a line of hybrid steel housing/aluminum trimmed rectilinear recessed continuously illuminated luminaires. The Forecast 4 is a 4" wide housing with a 3 1/8" aperture. Multiple ceiling configurations are available, accommodating various grid ceiling types as well as overlap and flange-free sheetrock. Forecast 4 can be lamped with LED as well as T5 and T8 lamps.