Indirect lighting fixture

Claim 2

An indirect fluorescent multiple tube light fixture for mounting a distance below a ceiling surface comprising an elongated rectangular housing having a flat bottom wall, linear fluorescent tubes mounted one above the other to define a lower tube and an upper tube, and elongated side reflectors arranged parallel to the tubes, an upper reflecting surface portion of each of said side reflectors being positioned above and at an angle closer to the vertical than a lower elongated reflecting surface portion of the side reflector, the upper and lower reflecting surface portions each being arranged to reflect light energy from the lower tube at a respective angle such that the reflected light energy will pass above the upper tube at a low angle to the horizontal, and the lower reflecting surface portion being below said upper tube and being arranged to reflect light energy from the upper tube at an angle such that the reflected light energy will pass above the upper tube at a low angle to the horizontal.

Claim 3

A fixture as in claim 1 wherein the upper elongated reflecting portion is arranged to reflect light energy from the upper tube at an angle such that the reflected light energy from the upper tube will pass above the upper tube at a low angle to the horizontal.

Claim 4

A fixture as in claim 1 wherein the elongated reflecting portions are each arranged such that light energy from the upper tube reflected by the respective reflecting portion passes above the upper tube at a lower angle to the horizontal than does light energy from the lower tube reflected by the respective reflecting portion.

Claim 5

A fixture as in claim 1 wherein the side reflectors have specular surfaces and the bottom wall is matte white, the bottom wall being arranged to reflect a portion of the flux from the lower tube.

Claim 6

A fixture as in claim 1 wherein the ballast is located adjacent to one end of said tubes and is oriented transversely to the tubes with its thinnest dimension perpendicular to the tubes.

Claim 7

A fixture as in claim 1 wherein first and second side walls extend in a general vertical direction from the bottom wall and have an inturned upper portion that supports the reflector.

Claim 8

A fixture as in claim 1 wherein the housing has a pair of end walls and the ballast has width and height dimensions the shortest of these being between the end of the tubes and an end wall.

Claim 9

A fixture as in claim 1 wherein the lamps are mounted one above another whereby the upper lamp redirects the upward flux from the lower lamp so that only flux from the upper lamp is emitted upward.

Claim 10

An indirect fluorescent multiple tube light fixture for mounting a distance below a ceiling surface comprising an elongated rectangular housing having a flat bottom wall, linear fluorescent tubes mounted one above the other to define a lower tube and an upper tube, and elongated side reflectors arranged parallel to the tubes, an upper reflecting surface portion of each of said side reflectors being positioned above and at an angle closer to the vertical than a lower elongated reflecting surface portion of the side reflector, and the upper and lower reflecting surface portions each being arranged to reflect light energy from the lower tube at a respective angle such that the reflected light energy will pass above the upper tube at a low angle to the horizontal, said lower reflecting surface portion being arranged such that light of the incident ray from said upper tube reflected by said lower reflecting surface portion does not intercept either said upper tube or said lower tube.

Claim 11

An indirect fluorescent multiple tube light fixture for mounting a distance below a ceiling surface comprising an elongated rectangular housing having a flat bottom wall, linear fluorescent tubes mounted one above the other to define a lower tube and an upper tube, and elongated side reflectors arranged parallel to the tubes, an upper reflecting surface portion of each of said side reflectors being positioned above and at an angle closer to the vertical than a lower elongated reflecting surface portion of the side reflector, and the upper and lower reflecting surface portions each being arranged to reflect light energy from the lower tube at a respective angle such that the reflected light energy will pass above the upper tube at a low angle to the horizontal, said lower reflecting surface portion being arranged such that light of the incident ray from said upper tube reflected by said lower reflecting surface portion does not intercept either said upper tube or said lower tube.

Claim 12

An indirect fluorescent light fixture for mounting a distance below a ceiling surface comprising: an elongated housing having a flat bottom wall; two linear fluorescent tubes mounted one above the other to define a lower tube and an upper tube; and, elongated side reflectors arranged parallel to and on opposite sides of said tubes, each of said side reflectors including a lower elongated reflecting surface portion and an upper elongated reflecting surface portion positioned above and at an angle closer to the vertical than the lower side portion, said tubes and said reflectors being arranged such that light energy from the incident rays from lower tube reflected from said upper and lower reflecting surface portions will pass above the upper tube at a low angle to the horizontal, light energy from the incident ray of upper tube reflected from said upper and lower reflecting surface portions will pass above the upper tube at a lower angle to the horizontal then does light energy from the lower tube reflected by the respective reflecting portion, and light energy from the incident ray from the upper tube reflected by the lower reflecting surface portion does not intercept either the upper tube or the lower tube.

Claim 13

An indirect fluorescent light fixture for mounting a distance below a ceiling surface comprising: an elongated housing having a flat bottom wall; two linear fluorescent tubes mounted one above the other to define a lower tube and an upper tube; and, elongated side reflectors arranged parallel to and on opposite sides of said tubes, each of said side reflectors including a lower elongated reflecting surface portion and an upper elongated reflecting surface portion positioned above and at an angle closer to the vertical than the lower side portion, said tubes and said reflectors being arranged such that light energy from the incident rays from lower tube reflected from said upper and lower reflecting surface portions will pass above the upper tube at a low angle to the horizontal, light energy from the incident ray of upper tube reflected from said upper and lower reflecting surface portions will pass above the upper tube at a lower angle to the horizontal then does light energy from the lower tube reflected by the respective reflecting portion, and light energy from the incident ray from the upper tube reflected by the lower reflecting surface portion does not intercept either the upper tube or the lower tube.

Claim 14

An indirect fluorescent multiple tube light fixture for mounting a distance below a ceiling surface comprising an elongated rectangular housing having a flat bottom wall, linear fluorescent tubes mounted one above the other to define a lower tube and an upper tube, and elongated side reflectors arranged parallel to the tubes, an upper reflecting surface portion of each of said side reflectors being positioned above and at an angle closer to the vertical than a lower elongated reflecting surface portion of the side reflector, the lower reflecting surface portion being positioned below the upper tube and being arranged to reflect light energy from the upper tube at an angle such that the reflected light energy will pass above the upper tube at a low angle to the horizontal and such that light of the incident ray from said upper tube reflected by said lower reflecting surface portion does not intercept either said upper tube or said lower tube.

Claim 15

An indirect fluorescent multiple tube light fixture for mounting a distance below a ceiling surface comprising an elongated rectangular housing having a flat bottom wall, linear fluorescent tubes mounted one above the other to define a lower tube and an upper tube, and elongated side reflectors arranged parallel to the tubes, an upper reflecting surface portion of each of said side reflectors being positioned above and at an angle closer to the vertical than a lower elongated reflecting surface portion of the side reflector, the lower reflecting surface portion being positioned below the upper tube and being arranged to reflect light energy from the upper tube at an angle such that the reflected light energy will pass above the upper tube at a low angle to the horizontal and such that light of the incident ray from said upper tube reflected by said lower reflecting surface portion does not intercept either said upper tube or said lower tube.