Metal or plastic honeycomb grid mounted in front of a lighting fixture to absorb spill light and focus the beam.
Definition
An Egg Crate (also called an Eggcrate, Honeycomb, or Grid) is an optical control element that resembles a honeycomb grid. It is used to concentrate light and reduce spread angles.
How it Works
Optical Design
- Honeycomb Grid: Metallic or plastic louvers in a honeycomb pattern
- Function: Absorbs light emitting sideways
- Effect: Concentrates light in a forward-directed path
- Angle Control: The narrower the cells, the tighter the beam
- Light Loss: 10-20% absorption by metal walls
Common Angle Configurations
| Angle | Usage | Light Loss |
|---|---|---|
| 30° | Very narrow focus | ~15% |
| 40° | Medium focus | ~12% |
| 50° | Wider focus | ~10% |
| 60° | Very wide | ~8% |
The narrower the angle, the more concentrated but less total light.
Practical Application
Egg Crates are used for:
- Focused Light: When a wide beam is not desired
- Light Spillage Reduction: Prevents light from leaving the intended area
- Contrast Increase: Sharper defined light edges
- Special Effects: Dramatic, directional lighting
- Set Lighting: Professional control without barndoors
- Industrial Lighting: Efficient energy use
Comparison with Other Control Systems
| System | Control | Light Loss | Flexibility |
|---|---|---|---|
| Barndoor | 4 sides | ~5% | Good |
| Egg Crate | All around | ~10-15% | Moderate |
| Shutters | Precise | ~3% | Very good |
| Snoot | Circular | ~20-30% | Low |
Installation and Handling
- Attachment: On a Snapgrid or special holders
- Replacement: Simple quick-release mechanism
- Material: Metallic or plastic
- Cleaning: Gently remove dust with a cloth
- Storage Conditions: Cool and dry
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