Set of two filter tubes for converting existing light level.
Set of two filter tubes for converting existing light levels on your ETDRS Illuminator Cabinet from the standard 160 cd/m2 to 85 cd/m2. Slides over the existing fluorescent lamps.
The filter tubes are guaranteed to maintain their properties for one year (defined as ten hours a day for 365 days). It takes only about one minute to install the filter tubes, which cost only $51.75 per cabinet.
Since most clinical trials replace bulbs after one year the replacement schedule for the bulb and filter are a perfect match.