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| | | Applying and Controlling Light | | |
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| | | Contrast Ratios Light on an object must be a minimum of three times brighter than its surrounding area for the object to be perceived as being illuminated. Five to one is generally preferred and contrasts of twenty to one or greater can be desirable for more dramatic lighting effects. | | |
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| | | 3:1 Contrast Ratio 5:1 Contrast Ratio 20:1 Contrast Ratio | | |
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| | | Light Control Lenses While in many applications the distribution of bare lamps is perfectly acceptable, most Juno Trac fixtures accept control lenses that can be used to create more sophisticated, dramatic effects and greater visual impact. | | |
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| | | UV Filter This dichroic filter blocks virtually all transmission below 400 nanometers, the range most responsible for UV degradation. | | |
| | | Bare Lamp Many bare lamps produce irregular round beam shapes and have light/dark striations. | | |
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| | | Note: Preservation and light degradation are of major concern when lighting any type of art. Light levels and heat associated with light sources are critical issues with respect to art media — paper wood, glues, watercolor pigments, lacquers, textiles and organic materials. If preservation is a concern you should consult a professional in this field. | | |
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| | | Uniformity Lens This fine-prism lens eliminates striations without noticeably altering the size of the beam or light output. | | |
| | | Color Filters These change white light into colored using colored glass. This is the lowest cost method of creating colored light effects. Dichroic Filters Dichroic filters are multi-layer thin-film coatings deposited on a glass substrate. Their light transmission levels are substantially higher than simple glass color filters, providing considerable savings in energy and money. Dichroic filters are highly color selective producing brighter, cleaner appearing, saturated color. | | |
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| | | Diffusion Lens Frosted lens softens the beam and lightly diffuses the pattern. | | |
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| | | Prismatic Spread Lens This course prismatic lens eliminates striations and enlarges the size of the beam. It is especially useful with narrow flood distribution lamps. | | |
| | | Daylight Color Correction Filter Dichroic filter corrects color temperature to approximately 4250K. | | |
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| | | Linear Spread Lens The linear prisms on this lens elongate the beam pattern into a wide oval pattern. It can be rotated so the beam is elongated either horizontally or vertically. | | Incandescent Color Correction Filter Dichroic filter corrects color temperature to approximately 2700K. | | |
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| | | Juno Lighting Group™ | | |
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