Lil’ Stacky.

spring_2016
m.arch i
environmental controls i
professor adam pyrek
the university of texas at austin
with sadie martin and anjulie palta.

This prototypical fixture is designed for use in the bedroom and the intent of this fixture is to provide illumination for a bedside table without causing direct or reflected glare. It is designed for tasks requiring lower lighting. The fixture is a 4”x4”x6” rectangular prism composed of walnut and plexiglass. One-third of the fixture (the base) is solid walnut, and the
remainder is composed of plexiglass, half frosted and half clear. The intent of the design and material composition, beyond the utilitarian function of task lighting, is to resemble a modern lantern exploring materiality and production, both digital and analog. The fixture is composed free of adhesive, with the panels being held together by wooden dowels. This
allows for easy access to the bulb for changing, but has a secondary function to allow the user to rearrange the panel assembly as he or she desires and explore a multitude of assembly options. The light source selected for this fixture is the Ikea LED LEDARE. With an output of 200 lumens and color temperature of 2700 kelvin (considered “warm daylight” in the product description), this bulb was determined to be ideal in providing low-level task lighting at a bedside location, while maintaining a high-quality CRI. With an LED life of

approximately 25000 hours, this bulb is likely to last about 20 years if the fixture is used for reading and other nighttime tasks for three hours each night.

Based on its intended function, this light fixture is most accurately categorized as a portable luminaire designed to rest on flat surfaces. The polar distribution curve for this light fixture indicates that the highest illuminance occurs directly above (180 degrees from nadar) the lighting fixture, at 4.94 footcandles, as well as the highest luminous intensity at 4.45 candelas. The rounded edges of the curve indicate that multiple fixtures would require closer spacing in order to deliver uniform light distribution to a horizontal work plane. Between 90 and 270 degrees, the illuminance varies from 1.84 to 4.94 footcandles, or 20 to 53 lux. According to Grondzik table 11.5, activities appropriate for this illuminance include visual tasks confined to movement and casual seeing without perception to detail. This indicates that the designed lamp would not be able to provide sufficient task lighting for all bedside tasks, such as reading, and may function better as supplemental lighting. On the other hand, outfitted with a light source with a higher lumen output this light fixture may be sufficient for more difficult visual tasks.

assembling base.
testing different layer arrangements.
sandblasting glass layers.
one possible layer arrangement.
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