All existing exterior lighting located on a subject property that is part of an application for design review approval, a conditional use permit, subdivision approval, or a building permit is required to be brought into conformance with this chapter before issuance of a Certificate of Occupancy, final inspection or final plat recordation, when applicable. All existing exterior lighting installed before the effective date of this Chapter shall be brought into conformance with this Chapter, except section 8-9-1(E)(3)within the following time periods:ī. All exterior lighting installed after the effective date of this Ordinance shall conform to the standards established by this Chapter.Ī. (9) To work with other jurisdictions within Jefferson County to meet the purposes of this Chapter. (8) To provide assistance to property owners and occupants in bringing non- conforming lighting into conformance with this Chapter and (6) To allow for flexibility in the style of lighting fixtures (5) To protect and reclaim the ability to view the night sky (4) To prevent light trespass in all areas of the City (3) To ensure that sufficient lighting can be provided where needed to promote safety and security (2) To protect against direct glare and excessive lighting (1) To provide safe roadways for motorists, cyclists and pedestrians This Article establishes standards for exterior lighting in order to accomplish the following: (B) Purposes: The general purpose of this Chapter is to protect and promote the public health, safety and welfare, the quality of life, and the ability to view the night sky, by establishing regulations and a process for review of exterior lighting. I trust the single pane one more of course.(A) Title: This Chapter, together with the amendments thereto, shall be known and may be cited as the Menan Outdoor Lighting Ordinance. One is with the double pane modeled (The one with 0 footcandles) and the other is with the single pane (The one upwards of 500 footcandles) Again I'll post the renderings soon to show the issue. I'm using DNI and DHI values I got from the Green Building Studio. I've not seen any examples from this site with fc levels that high. With a single pane, its somewhere at about 100 to 250 fc on some surfaces. As in, with a double pane window, room has very low fc levels, spanning from 0 to about 5. The issue is that, despite having the same T-Vis, the values for each are drastically different. I usually change the properties of the material to be 80,80,80 for single pane, or 116,116,116 for double pane before I render to keep both in about the 70% T-Vis Range. I can't trust anything Revit outputs for these renderings now. I started off modeling a single pane of glass because I thought it would be simplest. I know it has an effect because if I set the RGB values to 0, no light will come through a single pane ½” thick glass. For whatever reason, the glass pane T-Vis doesn’t seem to really handle the light the way I’d expect. This is using a T-Vis of 70% for each … I believe that’s where the problem lies. When created a double pane glass, with pane thicknesses of ¼” each, it was the opposite. So I started looking at the window family itself When I create a single pane that’s ½” thick, the light comes pouring through and seems to be very high.
I’ve tried recreating the room barebones with just the window … No such luck there either. I’ve tried creating a new project and linking the model into that file, adjusting the coordinates, and location accordingly. **Edit** Forgot to attach the render settings Īny idea what I'm doing wrong? The goal is to show different shading options for the typical classrooms and how they affect the space. However, in my scenario, they're getting into the 1000's. In the examples, the sample buildings barely seem to break 100. However, for some reason the values I'm getting for the footcandles seem to be VERY high. I've set it's RGB value (Which I understand determines its visible transmittance, or T-Vis) to about 146, which I think puts it somehwere between 75% from the table shown in the above link. There's only one window in the room really, and it has a glass pane thickness of 1/2", with only one pane modeled. The classroom in question is on the second floor, and I've set the ground plane to the appropriate level. I've gotten the DNI and DHI values for Sept. I've set my project location (Washington, DC). I think I've followed the guide found here:Īs best I can. Please find attached a preview of my settings. This is my first time trying this, but I'm trying to show illuminance levels within a typical classroom.
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