This D-11B TDP replacement lamp head has a diameter of 7.75" and is a replacement head for the D-04A (CQ-29C) and the D-11 (CQ-29CN) TDP Lamps.
The mineral plates within the lamp heads have an estimated working life of 1000-1500 hours. This means that they should last for years if used once a day for 20-minute treatments. If and when you need to replace your TDP lamp head, all you've got to do is:
1. Make sure the lamp is off (switches and dials at the "off" position) and unplug the power cable from the wall.
2. Unplug the power cable leading from the lamp to the head.
3. Loosen the top knob above the lamp head.
4. Pull the head out and replace with the new one.
5. Tighten top knob.
And you're good to go! We have replacement heads for all the lamps sold here.
NOTE: Please be sure your lamp is compatible with this replacement head. If the power cord from your lamp is not long enough to connect to the socket on the side of the replacement head, order with 12" power cord extension.