what 4. strategy would you see as possible for a warehouse hall consisting of dry storage, cooled storage and frozen part? It is considered as a regularly occupied space. Strategies A, B, C are simple, what else? Strategy D needs to limit the overhead lamps (what else is possible in the 10 m/ 30 ft high hall?), strategy E needs to paint the ceiling with white colour (the white ceiling in this height can not improve the quality of light and it is very expensive - a standard solution would be a galvanized trapezoidal sheet). Strategies F-H are out of topic as well.

Thank you for any opinion!