1) Blog for Week 7: Lighting Calculations. Using your text and other lighting texts from the library or from your previous classes, do some research and share your findings on the different kinds of lighting calculations that are out there.
Do Internet searches as well and share your web addresses and sources.
2) Reading Assignment: Chapter 6
3) Continue creating your programming for the Island Getaway working with your partner. This will be due via my e-mail (todonnell@aii.edu or venicetim@yahoo.com) by class time on Week 8. No class that day because of Labor Day.
4) deliverables for ID1605 Island Getaway (due Week 11):
ID1605 Principles of Lighting I: Residential Final Project/Course Portfolio
Instructor: Tim O’Donnell E-mail: todonnell@aii.edu Cell: 941-321-8447
Deliverables added to Island Getaway:
■ floor plan with a lighting overlay (required)
■ reflected ceiling plan (required)
■ elevations (required)
■ lighting detailed drawings (as needed)
■ perspectives (as needed)
■ axonometric views (optional)
■ concept statement (required) Describe your thought process and what your inspirations and choices were.
■ drawings /inspiration images/process work(required)
■ lighting specifications (required)
■ manufacturers cutsheets (required)
■ sketches of custom-designed luminaires (as needed)
■ samples of finishes (as needed)
■ detailed budget estimates (optional)
■ maintenance guidelines (optional)
■ projected timelines (optional)
■ questionnaire and project planning info from Chaps 10 & 11 (required)
Everything on 11” x 17” pages in a course portfolio format (no binder required), binder clips-no staples
Everything in same format on CD (this includes all projects from the quarter)
5) Deliverables for ID1608 U-shaped Theater- Part 2 (Due week 7 as work in progress):
Complete floorplans of lobby and mezzanine levels to correspond with existing auditorium levels. you will also need an overall section and should have begun the process of choosing your lighting, remember your four functions: ambient, task, accent and decorative. We definitely want all this iron clad by Week 9 so that we can add seating and acoustics to the final mix for Week 11.
6) your mid-term grade is going to be mostly based on your participation in the weekly blog, so get caught up (you know who you are).
Off you go,
Thanks,
~T
Subscribe to:
Post Comments (Atom)
15 comments:
Quick Note-
The lighting calculation software that was referred to me/us at the lighting design firm field trip some of us went on (for another class)is called: "Visual"
it is available for download here:
http://www.visual-3d.com/Downloads/Software/Software.aspx?SessionID=0
~!free!~
there is an interior tool listed here:
http://www.visual-3d.com/Software/InteriorTool/Default.aspx
I haven't tried it yet - but its what the local pros use. I wanted to share this early so that there would be some time to experiment with various options.
wrox is wendy-
for some reason it posted as my email this time
Thanks Wendy, that is too cool. I am a big advocate of lighting controls. I think they are efficient, sustainable, safe, and convenient for home and business owners. They can be manual, automated, or a combo of both, according to Fundamentals. The basic equipment includes switches, dimmers, timers, occupancy sensors, photosensors and central controls. These all help the user regulate all aspects of their lighting system; the when, how, where, and how much light.
Personally, I am a fan of timers and dimmers. Living at my boyfriend's house shows me the advantages of these. For example: the lights are already on outside when getting the paper in the morning, I feel safer and can see when it is still dark out; when going to bed at night we don't have to worry about bright hallway lights, because they are dimmed to appropriate way-finding levels (this also conserves energy when compared to the fixture’s normal maximum output).
General Electric has a “GE Lighting Tool Kit” that gives a lighting layout estimation calculator, energy estimators, fixture replacement estimators, and many more helpful tools regarding lighting. The best part is…they are all free!
http://www.gelighting.com/na/business_lighting/education_resources/tools_software/toolkit/
Hey Jamie, I tried the energy estimator.. its really cool, thanks for that link!
I just wanted to mention the calculations section in our text book from back in chapter 4, its on page 79. I think its very important for us to understand how to do the illuminance calculations by hand as well as the computer. I didn't realize all of these calculations took into consideration the proportions of a room, luminaire, lamps, locatoin of work surface, distance between the work surface and the luminaires, and the reflectance value of all the ceilings, walls, and floors. The book mentions 2 methods of calculations, lumen method and point-by-point method.
This site breaks down the lumen method a little more simple than the book does, also has examples for the formula:
http://personal.cityu.edu.hk/~bsapplec/lumen.htm
Also, heres the page for the point-by-point method, it has good diagrams if you have a hard time understanding cosine and all the good stuff:
http://personal.cityu.edu.hk/~bsapplec/newpage217.htm
Who ever said that all those algebra and trigometry classes would be useless is crazy! Just look at all these fun formulas!
And quick question on something I must've missed.. what is the manufacturers cutsheets?
I too am a fan of lighting controls as I mentioned in the last blog I find them functional and nothing less of fascinating. As designers why not make choices that create for healthier, happier & more environmentally friendly spaces.
The following websites give a description of some of the software currently used to perform lighting calculations as well as some sample videos and free downloads:
http://www.archiexpo.com/prod/agi32/light-calculation-software-10934-27551.html
http://www.agi32.com/
They are interesting, I am going to see how the download goes!
-Nicole De Anda
Hey Cassie, the manufacturer's cutsheets are those pages on the website with the most information about the particular light you are choosing. They have things like dimensions, photometrics, and specifications...check out the two links below. Not all websites are this obvious, but once you see one page, you can ususally spot others that you need for different fixtures.
http://www.vistalighting.com/cutsheets.asp#
http://www.vistalighting.com/pdf/1900%20intraoperative.pdf
Thanks Jamie... for some reason I thought those were the specifications , now it makes sense! Cool lighting website too..
I found a lighting site that breaks down one type of calculation into several steps. They also have charts that help to make sense of all the formulas. This particular calcucaltion helps to figure out how many fittings are required for a room. The formula begins with calculating room index:
Step 2: Calculate Room Index (K)
Room Index:
The room index is a number that describes the ratios of the rooms length, width and height.
Formula: K = L x W
Hm (L+W)
Where: L = Room Length
W = Room Width
Hm = Mounting Height of Fitting (from working plane)
Work Plane = Desk or Bench Height
The result of this calculation will be a number usually between 0.75 and 5.
Note: This formula for K is only valid when room length is less than 4 times the width or when the K value is greater than 0.75.
Step 3: Using the room index and reflectance values in the utilisation factor table
For the horizontal row select the reflectance that best describes the room.
For the vertical column select the room index value K as calculated above.
The utilisation factor for this fitting in this room is where the row and column intersect.
Step 4: To calculate the number of fittings required use the following formula:
Formula: N = E x A
F x uF x LLF
Where: N = Number of Fittings
E = Lux Level Required on Working Plane
A = Area of Room (L x W)
F = Total Flux (Lumens) from all the Lamps in one Fitting
UF = Utilisation Factor from the Table for the Fitting to be Used
LLF = Light Loss Factor. This takes account of the depreciation over time of lamp output and dirt accumulation on the fitting and walls of the building.
This site is definitely worth checking out. It seems a bit overwhelming on here, but the site has great charts and step by step calculations.
http://www.ndlight.com.au/lighting_calculations.htm
While reading the previous posts, I was struck by how important it is to never separate the different parts of the process of lighting design. If you read the fine print on most of the computer programs, most are limited to overall horizontal surface illumination calculations. This means that we need to be able to determine from our program what levels are needed in the different areas of the design. Our designer instinct is required to process the information that we receive to make the best decision for our clients. An over all illuminance calculation might be sufficient for a laboratory, but what about a home? or a retail space? We need to understand what illuminance levels are needed for each area, so we can interpret our findings in a meaningful way. The purpose of light, to reveal objects, can be hampered by too much as well as too little. Contrast is needed. Direction is needed. Not all calculations will work for each situation.
Here is an interesting sight with some thoughts on illuminance levels for various tasks.
Seth
Cristina was right about that website she posted up on the blog, i also had found that website and found it nice to look at, it shows a table and formulas that "calculate the number of fittings required for any room." It made it simple to understand.
I also found a powerpoint on http://www.eecs.utoledo.edu/~jheuring/EECS4530/Lectures/LightingCalculations_files/frame.htm
This one is a powerpoint showing you some different formulas on how to calculate light, it gives examples and takes you step by step.
Seth-
You are correct about the calculations limited to a specific plane. The given plane is at a set height per task. If you want a certain number of foot-candles at say desk level then the calculations will respond to that. Then further calculations must be made for each height plane that we are addressing.
I think this is helpful so that each are is given particular consideration, as opposed to an overall light level.
I must say that I am certainly confused by all of the formulas and numbers. Christina's link ( however informative ) is so confusing to the non-number brain like mine!
Hopefully - eventually I will get those equations!
Thanks everyone for all of the cool websites!
I found one to be interesting, it is Lutron Electronics, and it has AuroRa: which is a pre-programmed, wireless, radio frequency lighting control system that works all from a remote control. It controls the lights from in and around your house with this remote. It comes with dimmers, master control,wireless control, central antenna and design inserts. This was just a cool website to check out.
Now on to lighting calculations, I found a website that is called ateam.com (lighting calcualtions methods).
Point lighting calculations can optimize both lighting in task and in ambient domains. This minimizing energy consumption. This creates more energy efficient places and it will create a more visual and dramatic atmosphere for the area where the lights are being used. It effects the rooms surface, light on walls, rendering, and brings unifomity to the work plane. Lighting may be designed to highlight artwork and is also designed to determine whether or not the light will produce an extreme glare on the wall or if it will create reflections.
But, as all methods go, if it is not done correctly there will be consequences. Mathematics in this particular lighting calculation is very important,as it is in every method. So ensure that all calculations are correct, or it may result in a poor lit room.
Wow, what great sites. I book marked a few for later reference. I love math! It is fun and challenging. So, the photometric calculations could very well be my forte. However, with all the computer programs out there I doubt I would have to sit in a room with a pen and a pad for very long.
I found a really good description and summation of what the “modern Lumen” is. It takes you through the history, discovery, and development of the modern lumen.
http://www.visual-3d.com/Education/LightingLessons/Documents/PhotopicScotopicLumens_2.pdf
Leonard Troland in his 1929 book Psychophysiology, described exactly what had happened to light: “Illuminating engineers have chosen to define light in terms of the photopic visibility function, because the latter characterized conditions of daylight vision . . . It is evident that light, as thus conceived, is neither a physical nor a psychical quantity. It is rather a psychophysical notion, involving c.g.s. units on the one hand, and a physical dimension, which we may designate as Ψ on the other. Light can neither be identified with brilliance nor with radiant energy. It has the properties of both, taken together.”
The photometric graphs use a line graph with axis defining wavelengths and relative visibility.
Lighting calculations can seem like a bit much to thin about when adding lighting to a space. It is easier to think about how big the light fixture is and the placeing of the light in the space.For example not to have too much light on an object to fade it. Software programs with lighting are fun just as I use them in CAD. Certain rules do apply like the distance apart in commerical lighting should be about 7-8 feet apart.In doing a RCP keeping in mind the ceiling height ,function of the space,and natural lighting all help to add in placement of lighting elements.
Hey I found this website to add to everyone's list of good sites. It is a powerpoint where there is audio and he explains plainly how to do a lighting calculation. Which is great for me because I am lacking in the math department.
Enjoy!
http://material.fagerhultlightingacademy.com/articulate/light_fundamental/player.html
Post a Comment