Hypothesis – illuminating rooms

From researching existing heliostat designs in domestic applications, all of them suggest the user to point device to target something that has a mostly white surface to achieve the most illumination in a room. This is suggested through the targeting of existing lighting fixtures in a room like lamp shades and also white ceilings or walls. The benefit of this is the concentrated beam of light from the mirror is scattered when it hits a white surface, thus raising the ambient light level in the surrounding around.

A perceived increased in lux level can greatly improve the function of a existing room which would be otherwise not used when it is dimly lit.

I’ll test my theory about the scattering effect of the sunlight from the mirror. To see if there is a difference in the level of lux in a room if the reflected light is diffused before it reaches a desired target (lamp shade/ceiling/wall).

  • What effect does a diffuser have on the reflected light?
  • How much difference does a heliostat make in illuminating a room?
  • Do security bars on windows affect the performance of the heliostat?



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