This pack contains one spare tube for the Color Confidence GrafiLite. These energy efficient simulated natural light tubes are specially developed for the GrafiLite lamp holder.
Although GrafiLite tubes are rated for up to 10,000 hours, illumination quality will deteriorate with use (from either regular or intermittent usage). As with any professional viewing lamp, for consistent illumination quality, tubes should be replaced on an annual basis.
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