Replacement for VIQUA IHS12-D4 Replacement Light Bulb

4 pin style lamp,Fit For Pelican Water UV systems only,Low pressure high output lamp with a black base,Fit For models C, C4, D, D Plus, D4, D4 Plus, IHS12-D4,step 9 notice if this bulb was spent and we had an alarm here you have the alarm silence but once the new ball is back in place that's when you would push and hold this reset button for five seconds you'll hear a beep and that would reset this to 365 days once that's done the bulbs changed and you're ready for another year of treatment again