Dear,

We have made several daylight simulations with option 2 for different projects. So far, it seems nearly impossible to achieve even 1 point for this credit, mainly due to the 3000 lux limitation. It seems totally unfair, as these projects do have a sensible window ratio, we include the effect of shading due to neighbouring buildings and every project has automated external blinds, which can be used to control glare. VLT of the glass is usually good for a low-g glass (about 60 %).

Are we missing something? How do you achieve this credit? We are close to advise our clients to just forget about the daylight credit, which is definitely not the point of LEED.

Option 1 is usually not desired due to the additional simulation cost, but would probably not yield a better result due to no blinds in the ASE calculation.

Thanks for your feedback!

Sarah