referring now to the drawings , and particularly to fig1 - 10 , a preferred embodiment of the present device is shown , illustrating the forced air cooled metallic tubular horticulture light fixture used in developing plants in controlled growing environments . the exemplary embodiments according to the present device are illustrated with those components necessary to demonstrate the inventive design . many of the necessary electrical and mechanical elements for attaching , powering , and implementing are not present . for example , the electrical service connection of 110 volts and 220 volts is known by one of normal skill in the art but not specifically mentioned . fig1 illustrates one embodiment of the assembled device from a perspective view having a hollow sheet metal tube 100 fittingly attached to the reflector 130 . the hollow sheet metal tube 100 is preferred over a transparent tube because the hollow sheet metal tube 100 has heat shielding advantages while remaining lightweight and inexpensive . the reflector 130 reflects the light towards the plants and is thermally isolated from the growing environment by a transparent portion 108 . said transparent portion 108 is sized according to the aperture of the reflector 130 , thus minimizing the amount of transparent material needed . transparent materials are more expensive than sheet metal and tend to be heavier . therefore , it is desirable to minimize the amount of transparent material used . the inventor overcame the need for a heavy and expensive transparent tube by constructing the tube portion of inexpensive sheet metal . the inventor then improved the photometric properties of the fixture by integrating the reflector 130 within the hollow sheet metal tube 100 , accomplishing the thermal isolation of the heated air with a transparent portion 108 that could be flat and thin ; and , thus , reducing the overall cost and weight of the device . the transparent portion 108 can be constructed from inexpensive flat tempered glass and sized to match the reflector aperture , thus minimizing the amount of transparent material needed . although flat tempered glass is preferred , the transparent portion 108 may be constructed from any material that can withstand the temperatures produced by the grow lamp , while allowing light to pass through to the growing plants . in the preferred embodiment , said hollow sheet metal tube 100 is constructed from a single sheet of metal having a first round hollow end 102 and a second round hollow end 104 . the lamp socket bracket 140 is located and attached within the sheet metal tube 100 and approximately centered within the second round hollow end 104 . a first balancing suspender 110 and second balancing suspender 120 fixedly attach on the top side of the hollow sheet metal tube 100 providing structure to hang the device above the plants . a second suspender hole 125 is cut through the second suspender 120 and the sheet metal tube 100 providing an opening to the lamp socket bracket 140 for electrical connection . the reflector 130 is shown in this embodiment being approximately centered in the hollow sheet metal tube 100 . the reflector 130 is bounded by a first reflector end 132 and a second reflector end 134 . the reflector 130 is open towards the plants on the bottom and sealed by a transparent portion 108 . the transparent portion 108 may be constructed from any transparent material that will not melt or distort when exposed to high temperatures while allowing light to pass through to the plants . in the preferred embodiment , the transparent portion 108 is flat , and constructed of tempered glass . the reflector 130 has reflector side channels 310 bent and shaped from the long edges of the reflector 130 . the reflector side channels 310 are of size and dimension matching the transparent portion 108 . the second reflector end 134 has an end channel 300 bent and shaped from its bottom edge and matching the shape and dimensions of the short end of the transparent portion 108 . the transparent portion 108 slides within the reflector side channels 310 fittingly inserting into the end channel 300 , and held in place by the retention flap 170 . in other embodiments , the transparent portion may be held by tabs , sheet metal channels , heat resistant adhesives , or other methods of affixing the transparent portion 108 between the grow lamp and the plants . cooling atmosphere 112 can be flowed into the first round hollow end 102 and exhausted out of the second round hollow end 104 ; or , oppositely , cooling atmosphere 112 can be flowed into the second round hollow end 104 and exhausted out the first round hollow end 102 . round conduit is not shown , but could be connected making a closed loop cooling system isolating the growing environment from the heated atmosphere impacted by the grow lamp . the cooling atmosphere 112 may consist of air that is introduced at a lower temperature than the grow lamp , or any other gas that will conduct heat while passing around the grow lamp . fig2 illustrates a front view of the device demonstrating the lamp socket 210 as seen through the first round hollow end 102 . the lamp socket 210 is fixedly attached to the lamp socket bracket 140 and approximately centered within the hollow sheet metal tube 100 . the second balancing suspender 120 and lamp socket bracket 140 may be connected in by screws , pop rivets , or any other connection method providing a pass through connection to the second balancing suspender 120 , through the hollow sheet metal tube 100 , and into the lamp socket bracket 140 . the reflector 130 has a series of reflector bends 200 positioned and angled to reflect light towards the plants while forming a shape that can fit within the hollow sheet metal tube 100 . the second reflector end 134 bounds the reflector 130 and securely attaches to one end of the transparent portion 108 . fig3 is a left side view of one embodiment of the forced air cooled metallic tubular horticulture light fixture as shown in fig1 . the hollow sheet metal tube 100 is constructed from a single sheet of metal having a first round hollow end 102 and a second round hollow end 104 . the hollow sheet metal tube 100 is of a length adequate to house a commercially available grow lamp and accommodate the reflector 130 and first and second reflector ends 132 , 134 . the cooling atmosphere 112 may flow into the first round hollow end 102 and exhaust out of the second round hollow end 104 ; or , oppositely , the cooling atmosphere may flow into the second round hollow end 104 and exhaust out of the first round hollow end 102 . in the embodiment shown in fig3 , the first and second reflector ends 132 , 134 bound the reflector 130 at approximately 45 - degree angles . the reflector 130 is constructed and arranged to protrude from the hollow sheet metal tube 100 , bisecting the hollow sheet metal tube 100 approximately in half , leaving enough of the hollow sheet metal tube 100 intact at the first and second round hollow ends 102 , 104 for connection to round conduit . the size , shape , angle , and materials used in construction of the reflector 130 and first and second reflector ends 132 , 134 are determined by the desired photometric characteristics , light intensity , and grow lamp characteristics . the distance from the plants and the number of fixtures being utilized also drive the size , shape and angle of the reflector 130 and first and second reflector ends 132 , 134 . a first balancing suspender 110 and second balancing suspender 120 fixedly attach on the top side of the sheet metal tube 100 providing structure to hang the device above the plants . the location of the first and second balancing suspenders 110 , 120 is determined by the weight and balance of the device . the retention flap 170 pivotally connects to the reflector 130 on the opposite edge as the channel formed by the second reflector end 134 . cooling atmosphere 112 travels in a straight channel flow through the hollow sheet metal tube 100 , and may be flowed into the first round hollow end 102 and exhausted out of the second round hollow end 104 ; or , oppositely , cooling atmosphere 112 can be flowed into the second round hollow end 104 and exhausted out the first round hollow end 102 . fig4 illustrates a top side view of one embodiment of the forced air cooled metallic tubular horticulture light fixture as shown in fig1 . the hollow sheet metal tube 100 is approximately centered with respect to the reflector 130 . the first and second balancing suspenders 110 , 120 are approximately centered on the hollow sheet metal tube 100 and distanced in from the first and second round hollow ends 102 , 104 to facilitate connection to round conduit . the second suspender hole 125 is located approximately above the previously shown lamp socket bracket 140 allowing access for an electrical service connection to the grow lamp . in the preferred embodiment as shown , the transparent portion 108 is securely attached on the short ends via an end channel 300 formed by the second reflector end 134 and reflector side channels 310 and secured in place by the retention flap 170 on the opposite end of the end channel 300 . the retention flap 170 is pivotally connected to the reflector 130 . the reflector side channels 310 are bent , shaped , and formed from the same sheet as the reflector 130 and matched to the size and shape of the transparent portion 108 . when installing the transparent portion 108 , the transparent portion 108 is simply slid into the reflector side channels 310 formed by the reflector 130 until one short end fittingly inserts into the end channel 300 formed by the second reflector end 134 , and securely held in place by the retention flap 170 . the retention flap 170 pivotally connects to the reflector 130 allowing for easy removal of the transparent portion 108 for cleaning . the method of securing a piece of flat glass is well known in the art and the inventive device is not limited by the method shown in the preferred embodiment . fig5 illustrates a bottom side view of one embodiment of the forced air cooled metallic tubular horticulture light fixture as shown in fig1 . the hollow sheet metal tube 100 is approximately centered with respect to the reflector 130 . the reflector 130 is shaped and bent to reflect light towards the plants from the grow lamp while being fitted inside the hollow sheet metal tube 100 . the first reflector end 132 is shaped to match the reflector 130 and has an opening approximately matching the first round hollow end 102 . the retention flap 170 is pivotally connected to the reflector 130 and secures the transparent portion 108 by holding said transparent portion 108 in the reflector side channels 310 formed along the long edges of the reflector 130 and an end channel 300 formed along the edge of the second reflector end 134 . the second reflector end 134 is shaped to match the reflector 130 and has an opening approximately matching the second round hollow end 104 . the lamp socket bracket 140 is centered within the second round hollow end 104 and positioned to locate the grow lamp under the reflector bends 200 . the grow lamp may be located anywhere within the hollow sheet metal tube 100 , but the preferred embodiment locates the grow lamp between the reflector bends 200 and the transparent portion 108 . fig6 illustrates a right side exploded view of the preferred embodiment of the forced air cooled metallic tubular horticulture light fixture as shown in fig1 . the hollow sheet metal tube 100 has a cut - away portion 600 matching the shape and angle of the reflector 130 . the reflector 130 and hollow sheet metal tube 100 attach at the reflector - to - tube connections 640 . the first reflector end 132 and reflector 130 attach at the first reflector connection 610 . the second reflector end 134 and reflector 130 attach at the second reflector connection 610 . the bracket back plate 680 and lamp socket bracket 140 attach at bracket connection points 690 . the lamp socket bracket 140 , hollow sheet metal tube 100 , and second balancing suspender 120 , attach at the bracket - tube - suspender connection points 670 . attachment may be made via a bent over tab inserted into a punched out slot , a screw , heat resistant adhesive , or any other method allowing connection between the two pieces of sheet metal . the retention flap 170 pivotally connects to the reflector 130 and is of size and shape matching the transparent portion 108 . if a thicker transparent portion 108 is desired , the reflector side channels 310 , end channel 300 , and the retention flap 170 would be constructed having a size and shape matching the thicker transparent portion 108 . fig7 illustrates a perspective exploded view of the preferred embodiment of the forced air cooled metallic tubular horticulture light fixture as shown in fig1 . the hollow sheet metal tube 100 has a cut - away portion 600 matching the shape and angle of the reflector 130 . in the embodiment shown the seam 710 is located along the bottom side of the hollow sheet metal tube 100 . the bracket back plate 680 and lamp socket bracket 140 are not connected together until after the wiring is passed through the second suspender hole 125 and connected to the lamp socket 210 . the retention flap 170 pivotally connects to the reflector 130 and is of size and shape matching the transparent portion 108 . the reflector side channels 310 , end channel 300 , and the retention flap 170 are constructed and arranged to match the size and dimension of the desired transparent portion 108 the hollow sheet metal tube 100 is approximately centered with respect to the reflector 130 . the reflector 130 is shaped and bent to reflect light towards the plants from the grow lamp while being fitted inside the hollow sheet metal tube 100 . the reflector bends 200 may be of any number , angle , and shape to match the desired photometric performance , distance of hanging from the plants , or the particular type of grow lamp to be installed . the first and second balancing suspenders 110 and 120 are attached along the top of the hollow sheet metal tube 100 and located to balance the device when hung . the first reflector end 132 is shaped to match the reflector 130 and has an opening approximately matching the first round hollow end 102 . the retention flap 170 is pivotally connected to the reflector 130 and secures the transparent portion 108 by holding said transparent portion in the reflector side channels 310 formed along the long edges of the reflector 130 and an end channel 300 formed along the edge of the second reflector end 134 . the second reflector end 134 is shaped to match the reflector 130 and has an opening approximately matching the second round hollow end 104 . the lamp socket bracket 140 is centered within the second round hollow end 104 and positioned to locate the grow lamp 601 under the reflector bends 200 . the grow lamp 601 may be located anywhere within the hollow sheet metal tube 100 , but the preferred embodiment locates the grow lamp 601 between the reflector bends 200 and the transparent portion 108 . fig8 illustrates a perspective , side , top and end view of the hollow sheet metal tube 100 as shown in fig1 . the sheet metal tube 100 is formed from a single sheet of metal having a first round hollow end 102 and a second hollow end 104 . the electrical power inlet 700 can be located anywhere , but for the preferred embodiment the electrical power inlet 700 is located on the top side where the inventor anticipates electrical service . the cut - away portion 600 can be of any size , shape , and location along the hollow sheet metal tube 100 so long as the cut - away portion 600 matches the size and shape of the reflector 130 , and enough of the hollow sheet metal tube 100 extends beyond the cut - away portion 600 to allow for slide over connection to round conduit . the sheet metal seam 710 is located along the bottom of the hollow sheet metal tube 100 in the preferred embodiment , but may be located anywhere convenient to manufacturing . fig9 illustrates a perspective , side , and end view of the reflector 130 , first reflector end 132 , second reflector end 134 , and the retention flap 170 as assembled and shown in previous fig1 - 8 . the reflector side channels 310 are formed from the bottom long edges of the reflector 130 , sized to match the thickness of the desired transparent portion 108 . the end channel 300 is formed from the bottom edge of the second reflector end 134 , sized to match the thickness of the transparent portion 108 shown in earlier figures . the reflector bends 200 produce the desired photometric performance of the reflector 130 , and can be either many or one . the retention flap 170 pivotally connects to the reflector 130 and is of size and shape matching the transparent portion 108 . fig1 illustrates a rear view of the preferred embodiment depicting the lamp socket bracket 140 as seen through the second round hollow end 104 . the lamp socket bracket is approximately centered within the hollow sheet metal tube 100 . the lamp socket bracket 140 may be connected to the hollow sheet metal tube via screws , pop rivets , or some other attachment method that pass through the second balancing suspender 120 , through the hollow sheet metal tube 100 , through the reflector 130 , and attaching to the lamp socket bracket 140 . the second reflector end 134 is shaped to match the reflector 130 and has an opening approximately matching the second round hollow end 104 . the transparent portion 108 is held in place by the reflector side channels 310 formed along the long edges of the reflector 130 and an end channel 300 formed along the bottom edge of the second reflector end 134 .