Patent Publication Number: US-10774529-B2

Title: Ceiling tile with integrated lighting and ceiling system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of priority of U.S. Provisional Patent Application No. 62/611,587, filed Dec. 29, 2017, which is hereby incorporated herein by reference in its entirety. 
    
    
     BACKGROUND OF THE DISCLOSURE 
     1. Field of the Disclosure 
     The present disclosure relates generally to ceiling tiles, for example, suitable for placement in a ceiling grid. The present disclosure relates more particularly to a ceiling tile with an integrated light. 
     2. Technical Background 
     Ceiling tiles provide a practical and cost effective structure for constructing ceilings. The ceiling can be maintained easily by replacing old or damaged ceiling tiles, and any maintenance that is needed within the ceiling can be easily completed by temporarily removing one or more tiles. While the replacement of an entire ceiling tile with a similarly shaped lighting fixture is known, consumer preference mandates the availability of a variety of different lighting structures in tiled ceilings. 
     One lighting structure that is attractive and well-liked by consumers is linear lighting. In particular, linear lighting that spans a length that is longer than one ceiling tile is popular. To provide such lighting, contractors who are building a ceiling grid that will hold the ceiling tiles will incorporate a linear lighting structure into the grid itself. In other words, beams of the ceiling grid are constructed to surround the linear lighting structure, and the adjacent ceiling tiles are either cut down to size or shifted over to accommodate the linear light. The process of building additional grid to accommodate the linear light is time consuming and costly. Moreover, once the linear lighting is built into the ceiling grid, adjusting the lighting to accommodate new design preferences requires rebuilding the ceiling grid, which is nontrivial. The present inventors have recognized that a more convenient and flexible way to provide lighting in ceiling systems, including linear lighting, would be advantageous and attractive to builders. 
     SUMMARY OF THE DISCLOSURE 
     In one aspect, the present disclosure provides a ceiling tile comprising:
         a light housing extending across a first portion of a width of the ceiling tile; and   a panel extending across a remaining portion of the width of the ceiling tile.       

     In another aspect, the disclosure provides a ceiling system comprising:
         a ceiling grid including a plurality of beams defining a plane of the ceiling;   a plurality of first ceiling tiles supported by the ceiling grid; and   one or more second ceiling tiles including:
           a light housing extending across a first portion of a width of the ceiling tile, and   a panel extending across a remaining portion of the width of the second ceiling tile.   
               

     In another aspect, the disclosure provides a method of installing ceiling tiles in a ceiling, the method comprising:
         providing a ceiling grid including a plurality of beams defining a plane and arranged to provide a plurality of openings for ceiling tiles;   placing a plurality of first ceiling tiles in a first portion of the openings; and   placing one or more second ceiling tiles in at least one other opening in the ceiling grid so as to form a ceiling system comprising:
           the ceiling grid;   the plurality of first ceiling tiles supported by the ceiling grid; and   the one or more second ceiling tiles, each of the second ceiling tiles including:
               a light housing extending across a first portion of a width of the ceiling tile, and   a panel extending across a remaining portion of the width of the ceiling tile.   
               
               

     In another aspect, the disclosure provides a method of installing ceiling tiles in a ceiling, the method comprising:
         providing a ceiling grid including a plurality of beams defining a plane and arranged to provide a plurality of openings for ceiling tiles;   placing a first ceiling tile in a first opening in the ceiling grid; and   placing a second ceiling tile in a second opening in the ceiling grid, the second ceiling tile including:
           a light housing extending across a first portion of a width of the ceiling tile, and   a panel extending across a remaining portion of the width of the ceiling tile.   
               

     Additional aspects of the disclosure will be evident from the disclosure herein. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings are included to provide a further understanding of the methods and devices of the disclosure, and are incorporated in and constitute a part of this specification. The drawings are not necessarily to scale, and sizes of various elements may be distorted for clarity. The drawings illustrate one or more embodiment(s) of the disclosure, and together with the description serve to explain the principles and operation of the disclosure. 
         FIG. 1A  is a schematic cross sectional side view of a ceiling tile according to an embodiment of the disclosure; 
         FIG. 1B  is a schematic perspective top view of the ceiling tile of  FIG. 1A ; 
         FIG. 1C  is a schematic perspective bottom view of the ceiling tile of  FIG. 1A ; 
         FIG. 1D  is a schematic cross sectional side view of the ceiling tile of  FIG. 1A  in cooperation with elements of a ceiling grid; 
         FIG. 2A  is a schematic cross sectional view of a ceiling tile according to another embodiment of the disclosure in cooperation with elements of a ceiling grid; 
         FIG. 2B  is a schematic perspective bottom view of the ceiling tile of  FIG. 2A ; 
         FIG. 3A  is a schematic cross sectional view of a ceiling tile according to another embodiment of the disclosure in cooperation with elements of a ceiling grid; 
         FIG. 3B  is a schematic perspective bottom view of the ceiling tile of  FIG. 3A ; 
         FIG. 4  is a schematic cross sectional view of a ceiling tile according to yet another embodiment of the disclosure in cooperation with elements of a ceiling grid 
         FIG. 5  is a schematic cross sectional side view of a ceiling tile according to another embodiment of the disclosure in cooperation with elements of a ceiling grid; 
         FIG. 6  is a schematic cross sectional side view of a ceiling tile according to another embodiment of the disclosure in cooperation with elements of a ceiling grid; 
         FIG. 7  is a schematic cross sectional side view of a ceiling tile according to yet another embodiment of the disclosure in cooperation with elements of a ceiling grid; 
         FIG. 8  is a schematic cross sectional side view of a ceiling tile according to still another embodiment of the disclosure in cooperation with elements of a ceiling grid; 
         FIG. 9  is a schematic cross sectional top view of a ceiling tile according to an embodiment of the disclosure; 
         FIG. 10  is a schematic cross sectional top view of a ceiling tile according to another embodiment of the disclosure; 
         FIG. 11  is a schematic top view of a ceiling grid of a ceiling system according to an embodiment of the disclosure; 
         FIG. 12  is a schematic top view of the ceiling system of  FIG. 11  including ceiling tiles; 
         FIG. 13  is a schematic perspective bottom view of the ceiling system of  FIGS. 11 and 12 ; 
         FIG. 14  is a schematic top view of a ceiling system according to another embodiment of the disclosure; and 
         FIG. 15  is a schematic top view of a ceiling system according to another embodiment of the disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     As described above, the present inventors have noted that conventional lighting in a ceiling grid is costly and time consuming to construct. Further, modifying the lighting once constructed is also costly and time consuming. The present inventors have developed a ceiling tile that provides lighting that is more efficient and easier to construct and modify. 
     Accordingly, one aspect of the disclosure is a ceiling tile including a light housing extending across a first portion of a width of the ceiling tile, and a panel extending across a remaining portion of the width of the ceiling tile. Such a ceiling tile is shown in  FIGS. 1A to 1D . Ceiling tile  100  includes a light housing  120  and a panel  150 . As a whole, ceiling tile  100  has a width  102  and a breadth  104  (shown in  FIG. 1B ). The light housing  120  extends across a first portion  106  of the width  102  of ceiling tile  100 . Light housing  120  also extends across the entire breadth  104  of ceiling tile  100 . In use, light housing  120  provides a linear presentation of light into a room in which ceiling tile  100  is installed. For example, the light housing  120  reflects light from a light source  170  in the form of a strip of light emitting diodes (LEDs) to an area below the ceiling tile. Panel  150  has some overlap with light housing  120  and extends into the first portion  106  of the width  102  of the tile, but also extends across the remaining portion  108  of the width  102  of ceiling tile  100 . Similar to light housing  120 , panel  150  also extends across the entire breadth  104  of ceiling tile  100 . 
     The light in ceiling tile  100  is integrated into the tile such that construction of areas of the ceiling that include the lighting can be completed in much the same way that the areas of the ceiling that include conventional ceiling tiles are constructed. Once the ceiling grid is assembled, ceiling tile  100  with the integrated lighting can be placed into an opening in the grid to form a section of the ceiling with integrated lighting. Thus, ceiling tile  100  allows for the construction of lighting without any specialized placement of the ceiling grid beams or any added beams. 
     The integral construction of the light into ceiling tile  100  is accomplished by the attachment of the light housing  120  to the panel  150  of the tile. As the person of ordinary skill in the art will appreciate, the connection between the light housing and the panel can be accomplished in a variety of different ways. For example, the light housing may be attached to the panel using adhesive or fasteners. Other common methods are also possible. 
     In certain embodiments as otherwise described herein, the light housing is a linear light housing. The linear light housing extends across at least a portion of the ceiling tile and presents a linear representation of light into the space being illuminated. For example, the light housing in ceiling tile  100  is a linear light housing  120  and extends across the entire breadth of the ceiling tile  100 . Accordingly, linear light housing  120  presents a line of light that spans the entire breadth of the tile  100 . 
     In certain embodiments as otherwise described herein, the light housing extends across the first portion of the width of the ceiling tile from a first edge of the ceiling tile. For example, light housing  120  extends across the first portion  106  of ceiling tile  100  from edge  110 . Accordingly, the side of ceiling tile closest to edge  110  is entirely formed by lighting housing  100 . In other embodiments the portion of the width of the ceiling tile that the lighting housing extends across is spaced from the corresponding edges. 
     In certain embodiments as otherwise described herein, the light housing is non-linear. For example, ceiling tile  200 , shown in  FIGS. 2A and 2B , includes a circular light housing  220 . The circular light housing  220  extends across a first portion of the width of the ceiling tile that is located at the center of the ceiling tile. Accordingly, the panel  250 , extends across the remaining portion of the width of the ceiling tile on either side of the light housing  220 . A light source in the form of a ring of LEDs shines light up onto a dome-shaped reflector  280  that shines light down into the space below ceiling tile  200 . The ring of LEDs is disposed above panel  250 , and is therefore hidden when viewed from below. 
     Ceiling tile  300 , shown in  FIGS. 3A and 3B  also depicts a non-linear lighting housing. Specifically, lighting housing  320  is in the shape of an arc, and panel sections  350  are disposed on both sides of lighting housing  320 . The light source in ceiling tile  300  is provided by a strip of LEDs that is arranged in a curve within light housing  320  following the curve of the arc. The strip of LEDs is disposed above one of the panel sections  350  and is therefore obscured from view when looking up at the tile  300 . 
     In certain embodiments as otherwise described herein, the panel includes a body having a planar surface. In certain embodiments, the planar surface is parallel to the plane of the ceiling. For example, ceiling tile  100  includes a panel having a body  152  that has a planar surface  154 . The planar surface  154  is arranged to be parallel to a plane of the ceiling  115  when ceiling tile  100  is installed in the ceiling. In other embodiments, the panel includes a planar surface that is at an angle to the plane of the ceiling. For example, in some embodiments the planar surface of the panel is at an angle of no more than 30 degrees from the plane of the ceiling, e.g., no more than 20 degrees from the plane of the ceiling, e.g., no more than 10 degrees from the plane of the ceiling, e.g., no more than 5 degrees from the plane of the ceiling, such as 3 or 4 degrees. For example ceiling tile  400  includes a panel  450  with a body  452  that includes planar surface  454 . The planar surface  454  is disposed at a slight angle with respect to the plane of the ceiling  415 . 
     In certain embodiments as otherwise described herein, the ceiling tile further includes a contact surface disposed around a perimeter of the ceiling tile, where the contact surface defines the plane of the ceiling. In certain embodiments, the contact surface includes an outer edge of the light housing. Further, in certain embodiments, the contact surface includes a portion of the planar surface of the panel. For example, ceiling tile  100  includes a contact surface  130  that serves to support ceiling tile  100  on the structural members of a ceiling grid or other support surface. The use of contact surface  130  to support ceiling tile  100  is shown in  FIG. 1D , where ceiling tile  100  is being supported by two T-beams of a ceiling grid along the contact surface  130  of the tile. Contact surface  130  is disposed around the outer perimeter  132  of the tile and includes both an outer edge  134  of linear light housing  120  and also an outer portion of the planar surface  154  of panel  150 . In particular, contact surface  130  includes a portion of planar surface  154  that includes a section near edge  111  of the ceiling tile and sections along the opposing side edges  112 ,  113  that run across the width of the tile (shown in  FIG. 1B ). Because contact surface  130  of ceiling tile  100  is supported by elements of a ceiling grid, the contact surface  130  defines the plane  115  of the ceiling in which ceiling tile  100  is installed. 
     In certain embodiments as otherwise described herein, the contact surface includes a lower surface of a projection extending from an outer edge of the panel. For example, ceiling tile  500 , shown in  FIG. 5 , includes a projection  536  that extends outward at the outer edge of panel  550 . The projection  536  forms a portion of the contact surface  530  that supports ceiling tile  500  on the T-beams of the ceiling grid. The contact surface  530  of ceiling tile  500  also includes the outer edge  534  of the light housing  520 . While the cross-sectional view in  FIG. 5  only shows the projection  536  at edge  511 , it should be understood that panel  550  includes the projection  536  along the side edges of tile  500  as well. Of course it is also possible to restrict the projection to only certain areas of the outer edge of the panel. The projection  536  of ceiling tile  500  is not included on the inside edge of the panel  550  adjacent to the light housing  520 . However, in certain embodiments, the projection extends around the entire perimeter of the panel. 
     In certain embodiments as otherwise described herein, the ceiling tile further includes at least one clip attached to the panel, and the contact surface includes a surface of the at least one clip. For example, ceiling tile  600 , depicted in  FIG. 6 , includes clip  638  attached to panel  650 . Clip  638  extends outward from an outer edge of panel  650  and provides a surface  639  that is supportable by the T-beam of the ceiling grid. As a result, surface  639  forms a portion of the contact surface  630  of ceiling tile  600 , which also includes outer edge  634  of the linear light housing  620 . Clip  638  is attached to ceiling tile  600  by friction resulting from the clip being inserted into the body  652  of panel  650 . In other embodiments the clip is attached to the panel using an adhesive or a separate fastener. The depicted cross section of ceiling tile  600  only shows one clip  638  at outer edge  611 . However, ceiling tile  600  also includes a second clip along outer edge  611  for stability. In other embodiments, clips are also included along the side edges of the ceiling tile, where these additional clips also form portions of the contact surface. The use of clip  638  allows the panel  650  of tile  600  to include an outward flange  653  that obscures a portion of the ceiling grid. 
     In certain embodiments as otherwise described herein, the ceiling tile is rectangular. For example, ceiling tile  100 , shown in  FIGS. 1A to 1D , is rectangular with a width  102  and a breadth  104  that are equal in length (and thus, ceiling tile  100  is a square). The width  102  of ceiling tile  100  extends from edge  110  to edge  111  and the breadth  104  extends from edge  112  to edge  113 . In other embodiments, the ceiling tile has other shapes, such other polygons or closed curves. For example, one embodiment of a ceiling tile is a triangle where the linear light housing extends along one edge. In such an embodiment, where the shape has an odd number of sides, the width of the tile extends from one edge to an opposing point of the ceiling tile. Of course, other shapes such as pentagons, hexagons, octagons, circles, ellipses and ovals are also possible. 
     In certain embodiments as otherwise described herein, the width of the ceiling tile is in a range of 20 to 30 inches, e.g., 23 to 25 inches. In certain embodiments, the ceiling tile has a breadth in a range of 20 to 60 inches, for example a breadth in a range of 20 to 30 inches, such as 23 to 25 inches, or a breadth is in a range of 40 to 60 inches, such as 46 to 50 inches. 
     In certain embodiments as otherwise described herein, the first portion of the width of the ceiling tile is at least 5 percent of the width of the ceiling tile, e.g., at least 12 percent. In certain embodiments, the first portion is no more than 30 percent of the width of the ceiling tile, e.g., no more than 20 percent. 
     In certain embodiments as otherwise described herein, the body of the panel is composed of at least one of fiberglass, paper, stone wool, slag wool, perlite, metal, wood, and gypsum board. For example, in one embodiment, the body of the panel includes a combination of wood and metal. In certain embodiments, the body of the panel is composed of one of fiberglass, paper, stone wool, slag wool, perlite, metal, wood, or gypsum board. For example, ceiling tile  100 , shown in  FIGS. 1A to 1D  has a panel  150  with a body  152  made of gypsum board. As will be understood by those of ordinary skill in the art, the particular composition of the panel of the ceiling tile can be formed from a wide range of materials and combinations of materials 
     In certain embodiments as otherwise described herein, the panel includes a facing disposed on a lower side of the body. In certain embodiments, the facing comprises at least one of fiberglass, paint, veneer, or paper. For example, ceiling tile  700  in  FIG. 7  has a veneer facing  755  disposed on the lower surface of the body  752  of panel  750 . The use of a facing can provide a variety of different functions. For example, the facing can provide ornamentation, such as veneer facing  755  of tile  700 . In addition, the facing can provide structure to the panel, as with a paper facing on a gypsum tile. In certain embodiments as otherwise described herein, the facing extends over at least a portion of the opening of the light housing. In certain embodiments, the material of the facing has properties that disperse and/or reflect the light from the light housing, either directly as the light passes through the facing, or as reflected from the surrounding room. In other embodiments the facing provides other advantageous features as will be understood by those of ordinary skill in the art. 
     In certain embodiments as otherwise described herein, the planar surface extends across a majority of the panel. For example, planar surface  154  of tile  100  extends across the entirety of panel  150 . In other embodiments, the panel includes grooves or indents that interrupt the planar surface on the panel body. In such a case, the planar surface nonetheless extends over a majority of the panel. In still other embodiments, the planar surface covers less than a majority of the panel. 
     In certain embodiments as otherwise described herein, the planar surface has a texture imparted by a material of the panel body. For example, ceiling tile  800  in  FIG. 8  has a panel  850  with a body  852  formed of slag wool. As a result, the outside surfaces of the panel have a texture imparted by the slag wool. Accordingly, the planar surface  854  on the lower side of body  852  also has the texture. Nonetheless, the plane of the surface is evident from the common lower boundary of the slag wool material, as will be evident to those of ordinary skill in the art. 
     In certain embodiments as otherwise described herein, the panel has a thickness of at least 1/16 of an inch, e.g., ⅛ of an inch. In certain embodiments, the panel has a thickness of at least ¼ inch, e.g., at least ⅝ inch. Likewise, in certain embodiments, the panel has a thickness of no more than 3 inches, e.g., no more than 2 inches. 
     In certain embodiments as otherwise described herein, the light housing spans a breadth of the ceiling tile. For example, linear light housing  120  of ceiling tile  100  extends from edge  112  on one side of the ceiling tile to edge  113  at the opposite side of the ceiling tile. In other embodiments, the linear light housing extends across only a portion of the breadth of the ceiling tile. For example, in certain embodiments, the linear light housing extends across a central portion of the breadth of the ceiling tile, and is spaced apart from the side edges. In other embodiments, the light housing extends from one side across a majority of the breadth of the ceiling tile but stops short of the opposing side edge. Such a ceiling tile could be paired with another ceiling tile having a mirror image configuration so that the pair of light housings forms one elongate light. In still other embodiments, sections of light housing extend from both side edges of the ceiling tile but leave a central portion of the ceiling tile without any light housing. 
     In certain embodiments as otherwise described herein, the light housing includes an elongate wall and first and second end walls. For example, linear light housing  120  of ceiling tile  100 , as most clearly depicted in  FIG. 10 , includes elongate wall  122  extending from end wall  124  to end wall  126 . Elongate wall  122  extends across the entire breadth  104  of ceiling tile  100  where it meets end walls  124  and  126  at respective side edges  112  and  113  of the ceiling tile. Elongate wall  122  is curved along the width direction of ceiling tile  100  providing an enclosure of the housing  120 . As described in more detail below, the curved elongate wall forms a reflector of linear light housing  120 . In other embodiments, the elongate wall includes one or more planar surfaces that form an enclosure in the shape of a box. 
     In certain embodiments as otherwise described herein, the light housing includes an opening through which light is emitted. In some embodiments, the opening spans the breadth of the ceiling tile. For example, linear light housing  120  of ceiling tile  100  includes an opening  128 , as shown in  FIG. 1D , through which light shines down into the area below the ceiling. The opening  128  of linear light housing  120  extends across the entire breadth of ceiling tile  100  from edge  112  to edge  113 . As a result, the light from ceiling tile  100  is presented as a long linear light across the entire ceiling tile. 
     In certain embodiments as otherwise described herein, the opening of the light housing is rectangular. For example, opening  128  is formed as a rectangle between opposing end walls  124 ,  126  of the linear light housing  120  and between the outer edge  134  of the light housing and the inside edge of panel  150 . In other embodiments the opening is in the form of another shape. For example, in some embodiments where the ceiling tile has a shape other than a rectangle, the opening of the light housing may likewise not be rectangular. For example, in some embodiments of a ceiling tile with a triangular shape, the opening of the light housing is in the shape of a trapezoid. In other embodiments the opening is round, as in ceiling tile  200 . In certain embodiments the opening is in the shape of an arc, as in ceiling tile  300 . 
     In certain embodiments as otherwise described herein, the opening of the light housing has a width of at least 1 inch, e.g., at least 2 inches, e.g., at least 3 inches. In certain embodiments, the opening of the light housing has a width of no more than 12 inches, e.g., no more than 8 inches. Of course, a person of ordinary skill in the art will appreciate that the opening of the light housing can have other sizes as appropriate based on the size of the tile and the area to be illuminated. 
     In certain embodiments as otherwise described herein, the ceiling tile includes a light source that cooperates with the light housing. In certain embodiments the light source is disposed in the light housing. Further, in certain embodiments the light source is disposed on an upper side of the panel. For example, in ceiling tile  100 , light source  170  is positioned within linear light housing  120  on the inside edge of the housing. As most easily seen in the cross section of  FIGS. 1A and 1D , light source  170  is held on a portion of linear light housing  120  that extends over a narrow part of panel  150 . As will be appreciated by those of ordinary skill in the art, the light source may be coupled to the light housing using a variety of different methods and structures, such as adhesives, fasteners and/or brackets. 
     In other embodiments, the light source is remote from the light housing and shines light into the light housing from a distance. For example, in some embodiments the light source is disposed at a far edge of the ceiling tile and shines light into the light housing through an opening therein. In such an embodiment, the light housing serves to redirect the light downward toward the room or space that is covered by the constructed ceiling. In other embodiments, the ceiling tile does not itself include a light source. Instead, light is directed to the light housing from a remote location either directly, or through fiber optics, or by another method as will appreciated by a person of ordinary skill in the art. 
     In various embodiments, the light source itself is not substantially directly visible from a point under the bottom of the ceiling tile; the light source can instead be configured to shine up onto a reflector, which directs light down to points under the bottom of the ceiling tile. Such configurations are shown throughout the drawings. 
     In certain embodiments as otherwise described herein, the light source of the ceiling tile includes an array of LEDs. The array of LEDs includes one or more columns of LEDs that provide light along the length of the lighting housing. Because LEDs are small, the array can extend up to the very edge of the lighting housing with individual LEDs located close to the end walls of the housing. In certain embodiments the LEDs in neighboring columns are aligned, while in other embodiments the LEDs in neighboring columns are offset. In certain embodiments, the array includes a single column of LEDs. For example, in ceiling tile  100 , the light source  170  is formed by an array of LEDs having only one column. In particular, the LED array in ceiling tile  100  is an LED strip with a plurality of LEDs on a flexible circuit board. In other embodiments, the LEDs are disposed on one or more rigid backing, such as printed circuit boards. 
     In certain embodiments as otherwise described herein that have a light source with at least one LED, the ceiling tile includes an LED driver disposed on an upper surface of the panel. For example, ceiling tile  100  includes LED driver  172  disposed on the upper surface  156  of panel  150 . The LED driver  172  regulates the power to the LEDs of light source  170  in order to provide changing power to the LEDs as their electrical properties change with temperature. Accordingly, the LED driver allows the LEDs to emit a steady stream of light over the course of their operation. As will be appreciated by those of ordinary skill in the art the LED driver can be electrically connected to the LEDs of the LED array in a variety of different manners. For example, the LED driver can be connected by electrical leads to the circuit board or other backing of the LED array, which in turn provides power to the LEDs. As will be appreciated by those of ordinary skill in the art, the LED driver may be attached to the panel using a variety of different methods and structures, such as adhesives, fasteners and/or brackets. In certain embodiments as otherwise described herein, the LED driver is disposed on the light housing. For example, in some embodiments, the light housing includes a platform or other surface on which the LED driver is attached. 
     In certain embodiments as otherwise described herein, the ceiling tile includes an electronic controller including a memory for storing instructions and a processor to carry out the instructions. For example, in some embodiments the electronic controller includes instructions for operating the light source according to one or more varying lighting schemes as will be appreciated by a person of ordinary skill in the art, such as changing color or varying brightness at different times of the day. In certain embodiments the electronic controller includes one or more sensors that collects data that is stored in the memory and/or used by the processor. For example, in some embodiments the electronic controller includes a light sensor and the processor sends control signals for controlling the light source based on the light sensor. In certain embodiments the electronic controller includes a data transceiver for sending and/or receiving data. For example, in some embodiments the electronic controller includes a wireless data transceiver. As will be appreciated by a person of ordinary skill in the art, the data transceiver can be used to send data collected by the sensors and/or to receive updated instructions for operating the controller. In certain embodiments, the electronic controller is associated with the LED driver, for example, in some embodiments the LED driver is a module of the electronic controller. 
     In certain embodiments as otherwise described herein, the light source includes one or more fluorescent, halogen or incandescent bulbs. For example, in some embodiments, the light source includes a plurality of small incandescent or halogen bulbs arranged in a line similar to the LEDs of light source  170  in ceiling tile  100 . In other embodiments, the light source includes one or two long bulbs that extend along the length of the linear light housing. 
     In certain embodiments as otherwise described herein that have a light source with at least one fluorescent bulb, the ceiling tile further includes a fluorescent light ballast disposed on an upper surface of the panel. The fluorescent light ballast regulates current to the fluorescent bulb by adding impedance to the circuit of the fluorescent bulb as the voltage drop across the bulb changes. As will be appreciated by those of ordinary skill in the art, the fluorescent light ballast can be electrically connected to the fluorescent bulb in a variety of different manners. For example, the ballast can be connected by electrical leads to a socket that receives the fluorescent bulb. As also will be appreciated by those of ordinary skill in the art, the fluorescent light ballast may be attached to the panel using a variety of different methods and structures, such as adhesives, fasteners and/or brackets. 
     In certain embodiments as otherwise described herein, the fluorescent light ballast is disposed on the light housing. For example, in some embodiments, the light housing includes a platform or other surface on which the fluorescent ballast is attached. Further, in other embodiments the fluorescent light ballast is integrated with the fluorescent bulb, and a separate ballast is omitted. 
     In certain embodiments as otherwise described herein, the light source is configured to emit light through the opening that is substantially uniform along the length of the opening. The term substantially uniform as used herein means a difference in lux of no more than 20% between any two respective square inches of space along the length of the opening of the light housing. In such an embodiment, although the light emission along the length of light housing is substantially uniform, more substantial differences in light emission may be noticed across the width of the opening. The substantially uniform light emission along the length of the light housing can be achieved in a variety of manners. For example, in ceiling tile  100 , the column of LEDs of light source  170  extend up to the end walls  124 ,  126  of the linear light housing  120 , such that light of similar intensity is emitted along the entire length of the linear light housing  120 . In certain embodiments, the light source includes an electrical connector and the electrical connector is disposed on a long side of the light source. For example in ceiling tile  900  shown in  FIG. 9 , the light source includes a linestra bulb with an electrical connector  974  including two sockets that are disposed at either end of the bulb on the side of the bulb. This allows the bulb itself to extend up to the end walls  924 ,  926  of light housing  920 . In certain embodiments, the light source includes an electrical connector and the electrical connector is not disposed at an end of the light housing. For example, in ceiling tile  1000  shown in  FIG. 10 , the light source  1070  includes two twin tube compact fluorescent bulbs that extend outward from a center of the light housing  1020 . The electrical connector  1074  includes two sockets disposed at the center of the light housing. This allows the distal ends of the bulbs, which emit light, to be positioned near the end walls  1024 ,  1026  of the linear light housing  1020  and provide uniform light across the entire housing. 
     In certain embodiments, the ceiling tile further includes a light reflector disposed in the light housing. For example, the elongate wall  122  of linear light housing  120  of ceiling tile  100  serves as the light reflector  180 . Reflector  180  redirects the light that is shining at an upward angle from the LEDs of light source  170  downward through an opening  128  into the room that is covered by the ceiling tile. 
     While the reflector  180  forms the elongate wall  122  of linear light housing  120  in the embodiment of ceiling tile  100 , in other embodiments the reflector is separate from the wall of the housing and disposed inside the light housing. For example, in certain embodiments the light reflector includes a film, coating, or glass layer disposed over the wall of the light housing. In other embodiments, the reflector is spaced from the wall of the housing. For example, in some embodiments the reflector is a glass or metal sheet separate from the housing wall and disposed in the lighting housing. In certain embodiments the reflector and the panel are formed of the same material, e.g., metal or gypsum. 
     In certain embodiments as otherwise described herein, the light reflector is formed of metal, e.g., steel or aluminum. In other embodiments, the light reflector is formed of plastic, e.g., acrylic, polycarbonate, an acrylonitrile/butadiene/styrene polymer (ABS) or polyethylene terephthalate (PET). The reflector need not have a mirrored surface; in many embodiments the reflector will act to diffuse the light that it reflects. Still in other embodiments the light reflector is formed of glass. 
     In certain embodiments as otherwise described herein, the light housing includes an opening, and the light reflector faces the opening. In certain embodiments, the light reflector is curved and concave. For example, light reflector  180  of ceiling tile  100  is positioned over opening  128  and has a concave curve that directs a large portion of the light emitted from light source  170  through opening  128 . As will be appreciated by those of ordinary skill in the art, the angle of the light source and the curve of the reflector can be tailored so that the reflector redirects light that is spreading from the light source over a range of angles. 
     In certain embodiments as otherwise described herein, the light reflector is at an angle to the plane of the ceiling. For example, in some embodiments the light reflector is flat and is positioned at an appropriate angle to direct light from the light source through the opening of the light housing and into the room. 
     In certain embodiments as otherwise described herein, the light reflector is a diffuse reflector. The diffuse reflector scatters light from the light source to reflect the light over a range of angles. In certain embodiments the light source is non-diffuse. For example, in some embodiments the light source is formed by one or more incandescent bulbs that emit light from a filament. The filament provides the light from a point or a very small area. The diffuse reflector softens the light by spreading it over a larger area before it is directed into the room below the ceiling tile. In certain embodiments the reflector has a multi-faceted surface to spread the light, while in other embodiments the reflector has a smooth surface. 
     In certain embodiments as otherwise described herein, the light reflector includes a diffuse paint. In some embodiments the light reflector includes a roughened metal surface. In other embodiments the light reflector is formed of a white plastic, e.g., white PET or ABS. 
     In certain embodiments the light reflector is not a diffuse reflector. For example, in certain embodiments the light reflector has a mirror-like surface. In some of these embodiments the light source is configured to shine diffuse light onto the light reflector. Accordingly, while most of the reflection of the mirror-like surface of the reflector is specular, the diffuse light source provides light that is spread over a larger area to avoid the appearance of a point light source. For example, in certain embodiments as otherwise described herein, the light source includes a diffuser that spreads the light evenly over the light reflector. 
     Another aspect of the present disclosure is a ceiling system including a ceiling grid having a plurality of beams that define a plane of the ceiling, a plurality of first ceiling tiles supported by the ceiling grid, and one or more second ceiling tiles with an integrated light in accordance with any of the embodiments described above. Such a system is shown in  FIGS. 11 to 13 , which shows a portion of the system in the corner of a room adjacent to two perpendicular adjoining walls. Ceiling system  1190  includes a ceiling grid  1140  (most clearly shown in the schematic top view of  FIG. 11 ) that includes a plurality of beams  1142  extending in perpendicular directions from the supporting walls. The beams  1142  include T-beams  1143  that span the room and channels  1144  that are adjacent to the supporting walls. The beams  1142  are arranged in a perpendicular grid and provide openings that hold respective ceiling tiles. Ceiling system  1190  includes two groups of ceiling tiles: a group of first ceiling tiles  1192  that are conventional flat ceiling tiles, and a group of second ceiling tiles  1100  that each include an integrated linear light similar to ceiling tile  100  discussed above. The ceiling tiles are schematically depicted in the top view of  FIG. 12  and the bottom perspective view of  FIG. 13 . 
     In certain embodiments as otherwise described herein, each first ceiling tile includes a panel that is coplanar with the panel of the second ceiling tiles. Further, in certain embodiments, the panel of each first ceiling tile includes a planar surface, and wherein the planar surface of each first ceiling tile is coplanar with the planar surface of the second ceiling tile. For example, first ceiling tiles  1192  include panels  1195  that are coplanar with the panels  1150  of second ceiling tiles  1100 , and specifically include planar surfaces  1196  that are coplanar with the planar surfaces  1154  of second tiles  1100 . As a result, the panels  1195 ,  1150  of the ceiling tiles form a continuous planar ceiling surface that extends across the majority of the room, except where the linear lighting is provided by second ceiling tiles  1100 . 
     In certain embodiments as otherwise described herein, the panel of each first ceiling tile extends across an entire width of the respective ceiling tile. For example, in contrast to the panels  1150  of second ceiling tiles  1100 , which extend across only a portion of the respective tile&#39;s width, the panels  1195  of first tiles  1192  span the entire width of the tile. 
     In certain embodiments as otherwise described herein, each first ceiling tile is rectangular and has a width and a breadth, and each second ceiling tile is rectangular and has a width and a breadth that is the same as the width and the breadth of the first ceiling tiles. For example, the first ceiling tiles  1192  and second ceiling tiles  1100  are all squares of the same size, and thus have the same respective breadth and width. Accordingly, the first and second ceiling tiles  1192 ,  1100  can easily be moved to different openings in the ceiling grid, allowing simple modification of the ceiling system  1190 . 
     In certain embodiments as otherwise described herein, the second ceiling tile is removable from the ceiling grid by lifting the second ceiling tile. For example, second ceiling tile  1100  can be removed from the ceiling grid  1140  by simply lifting the tile up and out of the opening in the grid. The complete decoupling of the second ceiling tile  1100  from the ceiling system  1190  requires disconnecting electrical connections to the ceiling tile. However, removing tile  1100  does not require removal of any metal fasteners or any portion of the grid. 
     In certain embodiments as otherwise described herein, the second ceiling tile includes a contact surface disposed around a perimeter thereof, and the contact surface is supported by the beams of the ceiling grid. In certain embodiments, the beams of the ceiling grid include T-beams, and the contact surface of the second ceiling tile rests on flanges of a portion of the beams of the ceiling grid. For example, grid  1140  of ceiling system  1190  includes rows and columns of T-beams  1143  that form openings to hold the ceiling tiles. In particular, the flanges of the T-beams (see  FIG. 11 ) form a square surface that supports the contact surface around the perimeter of the ceiling tiles. (A cross section of the flanges of opposing T-beams supporting a ceiling tile is shown in  FIG. 1 .) 
     In certain embodiments as otherwise described herein, each tile in the group of second ceiling tiles is disposed adjacent to at least one other tile in the group of second ceiling tiles. In certain embodiments, the tiles in the group of second ceiling tiles are disposed in a line within the ceiling grid. For example, in ceiling system  1190 , three second ceiling tiles  1100  form a group that is disposed in a straight line within the ceiling grid  1140 . In other embodiments, the second ceiling tiles are organized in a cluster, for example with the linear light housings forming a pinwheel configuration. In certain embodiments, the tiles in the group of second ceiling tiles are disposed in a meandering path. For example, in ceiling system  1490 , the second ceiling tiles  1400  are each disposed adjacent to another second ceiling tile  1400  to form a path of ceiling tiles. In other embodiments, the tiles in the group of second ceiling tiles are disposed in a loop. For example, in ceiling system  1590 , the second ceiling tiles  1500  are arranged in a loop of eight tiles. While the loop in ceiling system  1590  surrounds a conventional ceiling tile  1592 , in other embodiments the loop of second ceiling tiles is compact and does not surround any other tiles. 
     In certain embodiments as otherwise described herein, the tiles in the group of second ceiling tiles have the same orientation, such that the respective light housings form a continuing linear light across the group of second ceiling tiles. For example, second ceiling tiles  1100  in ceiling system  1190  are arranged in a line where each tile is rotated in the same direction. As a result, the linear light housings combine to form one continuous linear light crossing a portion of the room. 
     In certain embodiments as otherwise described herein, the tiles in the group of second ceiling tiles are oriented to form a continuing path of light among the group of second ceiling tiles. For example, in ceiling system  1490 , the tiles are arranged adjacent to one another in a path and the light housings of the tiles are oriented to form a continuing path of light in a staircase pattern across the group of second ceiling tiles  1400 . 
     In certain embodiments as otherwise described herein, the tiles in the group of second ceiling tiles are oriented to form a continuous loop of light among the second ceiling tiles. For example, in ceiling system  1590 , the second ceiling tiles  1500  are arranged in a loop and are oriented so that the light housings also form a loop. Accordingly, when illuminated, the group of second ceiling tiles  1500  forms a continuous loop of light in the ceiling. 
     Another aspect of the present disclosure is a method of installing ceiling tiles in a ceiling that includes: providing a ceiling grid including a plurality of beams defining a plane and arranged to provide a plurality of openings for ceiling tiles; placing a plurality of first ceiling tiles in a first portion of the openings; and placing one or more second ceiling tiles in at least one other opening in the ceiling grid so as to form a ceiling system according to any of the embodiments described above. 
     Another aspect of the present disclosure is a method of installing ceiling tiles in a ceiling, the method comprising: providing a ceiling grid including a plurality of beams defining a plane and arranged to provide a plurality of openings for ceiling tiles; placing a first ceiling tile in a first opening in the ceiling grid; placing a second ceiling tile in a second opening in the ceiling grid, where the second ceiling tile is one including an integrated light as described in any of the embodiments above. 
     In certain embodiments as otherwise described herein, the method includes placing an additional second ceiling tile in a third opening adjacent to the second opening. In certain embodiments, the method includes positioning the second ceiling tiles to form a continuing linear light using the respective linear light housings. For example, second ceiling tiles  1100  in ceiling system  1190  were each rotated in the same manner before being placed within respective openings in the ceiling grid. Accordingly, the second ceiling tiles  1100  form a linear light across all three tiles. 
     In certain embodiments as otherwise described herein, the method includes placing a group of second ceiling tiles in respective adjacent openings in the ceiling grid. In certain embodiments, the method includes orienting the group of second ceiling tiles to form a continuing path of light among the second ceiling tiles. For example, as the tiles in ceiling system  1490  are placed into the ceiling grid, the second ceiling tiles  1400  are oriented form a continuing path of light in a staircase pattern across the group of second ceiling tiles  1400 . In other embodiments, the method includes orienting the group of second ceiling tiles to form a continuous loop of light among the second ceiling tiles. For example, as the tiles in ceiling system  1590  are placed into ceiling grid the second ceiling tiles  1500  are oriented to form a continuous loop of light around ceiling tile  1592 . 
     In certain embodiments as otherwise described herein, placing the second ceiling tile in the second opening includes lowering the second ceiling tile onto a group of the plurality of beams. For example, the second ceiling tile with the integrated light can be installed in the ceiling through the simple act of dropping the tile into the appropriate opening. Thus, attractive lighting, e.g., linear lighting, can be constructed without the need for building customized ceiling grid to accommodate the lighting, or for attaching linear lighting fixtures to the grid using metal fasteners. Instead, the light can be constructed as simply as installing ceiling tiles and providing an electrical connection to any corresponding light source. 
     Various aspects of the disclosure are further described by the following enumerated embodiments, which can be combined in any number and in any fashion that is not technically or logically inconsistent. 
     Embodiment 1 
     A ceiling tile comprising:
         a light housing extending across a first portion of a width of the ceiling tile; and   a panel extending across a remaining portion of the width of the ceiling tile.       

     Embodiment 2 
     The ceiling tile according to Embodiment 1, wherein the light housing is a linear light housing. 
     Embodiment 3 
     The ceiling tile according to Embodiment 1 or Embodiment 2, wherein the light housing extends from a first edge of the ceiling tile. 
     Embodiment 4 
     The ceiling tile according to Embodiment 1, wherein the light housing is nonlinear. 
     Embodiment 5 
     The ceiling tile according to any of Embodiments 1 to 4, wherein the panel includes a body having a planar surface. 
     Embodiment 6 
     The ceiling tile according to Embodiment 5, wherein the planar surface is parallel to a plane of the ceiling. 
     Embodiment 7 
     The ceiling tile according to any of Embodiments 1 to 6, further comprising a contact surface disposed around a perimeter of the ceiling tile, the contact surface defining the plane of the ceiling. 
     Embodiment 8 
     The ceiling tile according to Embodiment 7, wherein the contact surface includes an outer edge of the light housing. 
     Embodiment 9 
     The ceiling tile according to Embodiment 7 or Embodiment 8, wherein the panel includes a planar surface and wherein the contact surface includes a portion of the planar surface of the panel. 
     Embodiment 10 
     The ceiling tile according to any of Embodiments 7 to 9, wherein the contact surface includes a lower surface of a projection extending from an outer edge of the panel. 
     Embodiment 11 
     The ceiling tile according to any of Embodiments 7 to 10, further comprising at least one clip attached to the panel, and wherein the contact surface includes a surface of the at least one clip. 
     Embodiment 12 
     The ceiling tile according to any of Embodiments 1 to 11, wherein the ceiling tile is rectangular. 
     Embodiment 13 
     The ceiling tile according to any of Embodiments 1 to 12, wherein the width is in a range of 20 to 30 inches, e.g., 23 to 25 inches. 
     Embodiment 14 
     The ceiling tile according to any of Embodiments 1 to 13, wherein the ceiling tile has a breadth in a range of 20 to 60 inches. 
     Embodiment 15 
     The ceiling tile according to any of Embodiments 1 to 14, wherein the breadth is in a range of 20 to 30 inches, e.g., 23 to 25 inches. 
     Embodiment 16 
     The ceiling tile according to any of Embodiments 1 to 15, wherein the breadth is in a range of 40 to 60 inches, e.g., 46 to 50 inches. 
     Embodiment 17 
     The ceiling tile according to any of Embodiments 1 to 16, wherein the first portion is at least 5 percent of the width of the ceiling tile, e.g., at least 12 percent. 
     Embodiment 18 
     The ceiling tile according to any of Embodiments 1 to 17, wherein the first portion is no more than 30 percent of the width of the ceiling tile, e.g., no more than 20 percent. 
     Embodiment 19 
     The ceiling tile according to any of Embodiments 1 to 18, wherein the panel includes a body composed of at least one of fiberglass, paper, stone wool, slag wool, perlite, metal, wood, and gypsum board. 
     Embodiment 20 
     The ceiling tile according to any of Embodiments 1 to 19, wherein the panel includes a body composed of one of fiberglass, paper, stone wool, slag wool, perlite, metal, wood, or gypsum board. 
     Embodiment 21 
     The ceiling tile according to any of Embodiments 1 to 20, wherein the panel includes a facing material disposed on a lower side of the body. 
     Embodiment 22 
     The ceiling tile according to Embodiment 21, wherein the facing material comprises at least one of fiberglass, paint, veneer or paper. 
     Embodiment 23 
     The ceiling tile according to any of Embodiments 1 to 22, wherein the panel includes a planar surface that extends across a majority of the panel. 
     Embodiment 24 
     The ceiling tile according to any of Embodiments 1 to 23, wherein the panel includes a planar surface that has a texture imparted by a material of the panel body. 
     Embodiment 25 
     The ceiling tile according to any of Embodiments 1 to 24, wherein the panel has a thickness of at least 1/16 inch, e.g., at least ⅛ inch, e.g., at least ¼ inch, e.g., at least ⅝ inch. 
     Embodiment 26 
     The ceiling tile according to any of Embodiments 1 to 25, wherein the panel has a thickness of no more than 3 inches, e.g., no more than 2 inches. 
     Embodiment 27 
     The ceiling tile according to any of Embodiments 1 to 26, wherein the light housing spans a breadth of the ceiling tile. 
     Embodiment 28 
     The ceiling tile according to any of Embodiments 1 to 27, wherein the light housing includes an elongate wall and first and second end walls. 
     Embodiment 29 
     The ceiling tile according to any of Embodiments 1 to 28, wherein the light housing includes an opening through which light is emitted. 
     Embodiment 30 
     The ceiling tile according to Embodiment 29, wherein the opening spans a breadth of the ceiling tile. 
     Embodiment 31 
     The ceiling tile according to Embodiment 29 or Embodiment 30, wherein the opening is rectangular. 
     Embodiment 32 
     The ceiling tile according to any of Embodiments 29 to 31, wherein the opening has a width of at least 1 inch, e.g., at least 2 inches, e.g., at least 3 inches. 
     Embodiment 33 
     The ceiling tile according to any of Embodiments 29 to 32, wherein the opening has a width of no more than 12 inches, e.g., no more than 8 inches. 
     Embodiment 34 
     The ceiling tile according to any of Embodiments 1 to 33, further comprising a light source that cooperates with the light housing. 
     Embodiment 35 
     The ceiling tile according to Embodiment 34, wherein the light source is disposed in the light housing. 
     Embodiment 36 
     The ceiling tile according to Embodiment 34 or Embodiment 35, wherein the light source is disposed on an upper side of the panel. 
     Embodiment 37 
     The ceiling tile according to any of Embodiments 34 to 36, wherein the light source comprises an array of LEDs. 
     Embodiment 38 
     The ceiling tile according to Embodiment 37, wherein the array includes a single column of LEDs. 
     Embodiment 39 
     The ceiling tile according to Embodiment 37 or Embodiment 38, further comprising an LED driver disposed on an upper surface of the panel. 
     Embodiment 40 
     The ceiling tile according to Embodiment 37 or Embodiment 38, further comprising an LED driver disposed on the light housing. 
     Embodiment 41 
     The ceiling tile according to any of Embodiments 34 to 36, wherein the lights source comprises at least one halogen or incandescent bulb. 
     Embodiment 42 
     The ceiling tile according to any of Embodiments 34 to 36, wherein the light source comprises a fluorescent bulb. 
     Embodiment 43 
     The ceiling tile according to Embodiment 42, further comprising a fluorescent light ballast disposed on an upper surface of the panel. 
     Embodiment 44 
     The ceiling tile according to Embodiment 42, further comprising a fluorescent light ballast disposed on the light housing. 
     Embodiment 45 
     The ceiling tile according to any of Embodiments 34 to 44, wherein the light housing includes an opening, and wherein the light source is configured to emit light through the opening that is substantially uniform along the length of the opening. 
     Embodiment 46 
     The ceiling tile according to any of Embodiments 34 to 45, wherein the light source includes an electrical connector and the electrical connector is disposed on a long side of the light source. 
     Embodiment 47 
     The ceiling tile according to any of Embodiments 34 to 46, wherein the light source includes an electrical connector, and wherein the electrical connector is not disposed at an end of the light source. 
     Embodiment 48 
     The ceiling tile according to any of Embodiments 1 to 47, further comprising a light reflector disposed in the light housing. 
     Embodiment 49 
     The ceiling tile according to Embodiment 48, wherein the light reflector is formed of metal, e.g., steel or aluminum. 
     Embodiment 50 
     The ceiling tile according to Embodiment 48, wherein the light reflector is formed of plastic, e.g., acrylic, polycarbonate, ABS or PET. 
     Embodiment 51 
     The ceiling tile according to any of Embodiments 48 to 50, wherein the light housing includes an opening, and wherein the light reflector faces the opening. 
     Embodiment 52 
     The ceiling tile according to any of Embodiments 48 to 51, wherein the light reflector is curved and concave. 
     Embodiment 53 
     The ceiling tile according to any of Embodiments 48 to 51, wherein the light reflector is at an angle to the plane of the ceiling. 
     Embodiment 54 
     The ceiling tile according to any of Embodiments 48 to 53, wherein the light housing includes an elongate wall, and wherein the light reflector is formed on a surface of the elongate wall. 
     Embodiment 55 
     The ceiling tile according to any of Embodiments 48 to 54, wherein the light reflector is a diffuse reflector. 
     Embodiment 56 
     The ceiling tile according to Embodiment 55, wherein the light source is non-diffuse. 
     Embodiment 57 
     The ceiling tile according to Embodiment 55 or Embodiment 56, wherein the light reflector includes a diffuse paint. 
     Embodiment 58 
     The ceiling tile according to Embodiment 55 or Embodiment 56, wherein the light reflector includes a roughened metal surface. 
     Embodiment 59 
     The ceiling tile according to Embodiment 55 or Embodiment 56, wherein the light reflector is formed of a white plastic, e.g., white PET or ABS. 
     Embodiment 60 
     The ceiling tile according to any of Embodiments 48 to 54, wherein the light reflector has a mirror-like surface. 
     Embodiment 61 
     The ceiling tile according to Embodiment 60, wherein the light source includes a diffuser. 
     Embodiment 62 
     The ceiling tile according to any of Embodiments 48 to 61, wherein the light source further comprises a light source that cooperates with the light housing and is not directly visible from a point under the bottom of the ceiling tile, and wherein the light source is configured to shine up onto the light reflector, which directs light to points under the bottom of the ceiling tile. 
     Embodiment 63 
     A ceiling system comprising:
         a ceiling grid including a plurality of beams defining a plane of the ceiling;   a plurality of first ceiling tiles supported by the ceiling grid; and   one or more second ceiling tiles according to any of Embodiments 1 to 62 supported by the ceiling grid.       

     Embodiment 64 
     The ceiling system according to Embodiment 63, wherein each first ceiling tile includes a panel that is coplanar with the panel of the second ceiling tile. 
     Embodiment 65 
     The ceiling system according to Embodiment 64, wherein the panel of each first ceiling tile includes a planar surface, and wherein the planar surface of each first ceiling tile is coplanar with the planar surface of the second ceiling tile. 
     Embodiment 66 
     The ceiling system according to Embodiment 64 or Embodiment 65, wherein the panel of each first ceiling tile extends across an entire breadth of the respective ceiling tile. 
     Embodiment 67 
     The ceiling system according to any of Embodiments 63 to 66, wherein each first ceiling tile is rectangular and has a width and a breadth, and wherein the second ceiling tile is rectangular and has a width and a breadth that is the same as the width and the breadth of the first ceiling tiles. 
     Embodiment 68 
     The ceiling system according to any of Embodiments 63 to 67, wherein the second ceiling tile is removable from the ceiling grid by lifting the second ceiling tile. 
     Embodiment 69 
     The ceiling system according to any of Embodiments 63 to 68, wherein the second ceiling tile includes a contact surface disposed around a perimeter thereof, and wherein the contact surface is supported by the beams of the ceiling grid. 
     Embodiment 70 
     The ceiling system according to Embodiment 69, wherein the beams of the ceiling grid include T-beams, and 
     wherein the contact surface of the second ceiling tile rests on flanges of a portion of the beams of the ceiling grid. 
     Embodiment 71 
     The ceiling system according to any of Embodiments 63 to 70, wherein the one or more second ceiling tiles includes a group of second ceiling tiles. 
     Embodiment 72 
     The ceiling system according to Embodiment 71, wherein each tile in the group of second ceiling tiles is disposed adjacent to at least one other tile in the group of second ceiling tiles. 
     Embodiment 73 
     The ceiling system according to Embodiment 72, wherein the tiles in the group of second ceiling tiles are disposed in a line within the ceiling grid. 
     Embodiment 74 
     The ceiling system according to Embodiment 73, wherein the tiles in the group of second ceiling tiles have the same orientation, such that the respective light housings form a continuing linear light across the group of second ceiling tiles. 
     Embodiment 75 
     The ceiling system according to Embodiment 72, wherein the tiles in the group of second ceiling tiles are oriented to form a continuing path of light across the group of second ceiling tiles. 
     Embodiment 76 
     The ceiling system according to Embodiment 72, wherein the tiles in the group of second ceiling tiles are oriented to form a continuous loop of light. 
     Embodiment 77 
     A method of installing ceiling tiles in a ceiling, the method comprising:
         providing a ceiling grid including a plurality of beams defining a plane and arranged to provide a plurality of openings for ceiling tiles;   placing a plurality of first ceiling tiles in a first portion of the openings; and   placing one or more second ceiling tiles in at least one other opening in the ceiling grid so as to form a ceiling system according to any of Embodiments 63 to 76.       

     Embodiment 78 
     A method of installing ceiling tiles in a ceiling, the method comprising:
         providing a ceiling grid including a plurality of beams defining a plane and arranged to provide a plurality of openings for ceiling tiles;   placing a first ceiling tile in a first opening in the ceiling grid;   placing a second ceiling tile according to any of Embodiments 1 to 62 in a second opening in the ceiling grid.       

     Embodiment 79 
     The method according to Embodiment 78, further comprising placing an additional second ceiling tile in a third opening adjacent to the second opening. 
     Embodiment 80 
     The method according to Embodiment 79, further comprising positioning the second ceiling tiles to form a continuing linear light using the respective light housings. 
     Embodiment 81 
     The method according to Embodiment 78 or Embodiment 79, further comprising placing a group of second ceiling tiles in respective adjacent openings in the ceiling grid. 
     Embodiment 82 
     The method according to Embodiment 81, further comprising orienting the group of second ceiling tiles to form a continuing path of light among the second ceiling tiles. 
     Embodiment 83 
     The method according to Embodiment 81, further comprising orienting the group of second ceiling tiles to form a continuous loop of light among the second ceiling tiles. 
     Embodiment 84 
     The method according to any of Embodiments 78 to 83, wherein the placing the second ceiling tile in the second opening includes lowering the second ceiling tile onto a group of the plurality of beams. 
     It will be apparent to those skilled in the art that various modifications and variations can be made to the processes and devices described here without departing from the scope of the disclosure. Thus, it is intended that the present disclosure cover such modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.