Ceiling Grid Lights
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| Fluorescent Lights |
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| Teardrop Light |
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| 2' x 4' (610 mm x 1219 mm) Ceiling Module |
- Make it easy to configure the optimal lighting for your application
- Select 2 x 4 (610 mm x 1219 mm) ceiling module for placement in the ceiling grid, or Teardrop Lights for installation below the grid
- Flow-Through units are ideal with dense FFU ceiling coverage
Teardrop Lights
Ideal for Class 1 or Class 10 cleanrooms, in which near-100% filter coverage of the ceiling leaves no space for standard fluorescent light modules. Aerodynamic design ensures minimal interference of the laminar airflow. Dimensions: 48"L x 2"D x 6"H (1219 mm x 51 mm x 152 mm). Price includes installation (specify desired location when ordering).
2' x 4' (610 x 1219 mm) Ceiling Module
This 2' x 4' (610 mm x 1219 mm) painted steel housing includes four fluorescent light tubes, providing 4,560 foot candles. Price includes installation (specify desired location when ordering).
Flow-Through Module
Low-profile, fluorescent-tube module stacks beneath a 2' x 4' (610 mm x 1219 mm) FFU. Adds 4.75" (121 mm) to ceiling height. Intensity: 3,150 foot candles. Must be ordered together with FFU.
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| Ordering Information Fluorescent Illuminators |
| Module Type |
Intensity
(Candela**) |
115VAC / 60Hz |
277VAC / 60Hz |
| Cat. # |
$/Each |
Cat. # |
$/Each |
| Teardrop Light (48"L, 1219 mm) |
280 |
6704-15 |
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6704-15 |
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| 2' x 4' ( 610 mm x 1219 mm) Ceiling Module |
3,409 |
3800-80 |
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3800-80 |
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| 2' x 4' (610 mm x 1219 mm) Flow-Through Module* |
2,355 |
6704-77 |
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6704-77-277 |
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* Order together with desired FFU.
** Candela (candlepower) is an expression of intensity at the light source. To calculate foot candles at your work surface, divide candlepower by the square of the distance from light to surface:
For instance, a standard 2’ x 4’ (610 mm x 1219 mm) ceiling fixture, which produces 3409 candle power at the lamp positioned 5.5 feet (1674 mm) above a workstation (a typical distance in a room with an 8-feet, 2438 mm, high ceiling), provides about 113 foot candles of light at the work surface (3409/30.25 = 112.69). This is equivalent to 1215 lux (at 10.76 lux/fc). See lighting recommendations below. |
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EnergySaver Light Control System
Allows centralized on/off light control to reduce energy when room is unoccupied. Order EnergySaver Console.
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Cat. # |
$/Each |
| 120VAC |
6602-22 |
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Easy-Clean Light Guard
Fits beneath any 2' x 4' (610 mm x 1219 mm) ceiling fixture to allow easy cleaning with most disinfectants. Transparent polycarbonate panel transmits virtually 100% of light. Includes chemical-resistant, noncontaminating gasket.
| Cat. # |
$/Each |
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3800-25 |
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Germicidal UV Illuminator
2' x 4' (610 mm x 1219 mm) fixture contains four 254nm UV tubes for germicidal control. Operates on 115VAC or 277VAC, 60Hz power.
| Cat. # |
$/Each |
| 3800-26 |
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Fluorescence-Detection UV Illuminator
2' x 4' (610 mm x 1219 mm)fixture contains four 365nm UV tubes for fluorescence detection. Operates on 115VAC or 277VAC, 60Hz power.
| Cat. # |
$/Each |
| 3800-27 |
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Yellow filters available; call for pricing |
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Cleanroom Lighting
Terra offers three lighting modules.
For applications that do not require 100% FFU ceiling coverage, 2' x 4' (610 mm x 1219 mm) illuminators can be positioned in unused ceiling grids.
For applications that require total or near-total FFU ceiling coverage, teardrop and flow-through lighting modules are available. Teardrop fluorescent lights mount to the ceiling grid below the FFU. Their aerodynamic design does not interfere with the laminar airflow. Each of these single-tube lights requires 6" (152 mm) of vertical clearance below the FFU filter face.
As an alternative to teardrop lights, you can select 2' x 4' (610 mm x 1219 mm) flow-through lights, which are stacked below the FFU. Flow-through lights add 4 3/4" (121 mm) to the ceiling height but require no vertical clearance below the filter face, making them ideal for low-ceiling cleanrooms.
Use these guidelines in selecting the appropriate number of lighting modules for your application:
| Light Level |
Viewing Requirements |
Foot-Candles |
| Dim |
Large Part Sizes, High Contrast |
20 - 50
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| Average |
Small Part Sizes, Medium Contrast |
100 - 200
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| Bright |
Small Part Sizes, Low Contrast |
200 - 500
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