Honeybee plus - annual daylight Vs daylight cofficent recipe

[LiamRuvio]

Dear @Matteo,

In HB Legacy, for the Daylight Factor, the ground reflection, is calculated automatically, there should be no need to add it:

Ground Light in Daylight factor

Hi all, I have a question concerning the light source (.sky file) for daylight factor simulation. While comparing the results with Dial+ and radiance/sketchup, I found out that honeybee isn’t considering ground glow (usually representing a 20% ground reflection) while other software do consider it. This leads to lower results of daylight factor all over the zone, but particularly on the back on the zone as it is mainly lit by groung glow in other softwares. So my questions are : 1 - Is this…

Dear @sarith, making comparisons between HB Legacy and HB+, analyzing the daylight factor or annual illuminance (without shadings), I also found that for the same parameters, the result out from HB+ is always greater (I think as you mentioned, about 20%).
In my opinion the discrepancy of 20% is important, so I wanted to ask you, what would you advise to use between the two processes for a “simple” daylight simulation?

Greetings and happy holidays.
L.R.