Alpine™ 200 and 300 Watt Transformers with Photocell & Timer Size:300 Watt The PN series provides a

The PN series provides a good match for filters that require a vertical style pump housing

Built-in photocell and time interval selector

including: crabs

1-year limited warranty

This kit is for FilterFalls BF1900

Alpine™ 200 and 300 Watt Transformers with Photocell & Timer Size:300 Watt The PN series provides aPhotocell Digital timer for 4,6 or 8 hours Photocell & digital timer can work together Weather proof PVC housing 9" x 5" x 5" 2 Year Warranty Use our calculators below to determine the transformer size that you need. Use the top calculator when all of your lights are the same wattage. Use the bottom calculator when you have multiple wattages. For more information on calculating transformer size, see here.