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Tombstone Lampholders
Tombstone non-
Tombstone shunted bipin
Bypin
Tall Bypin
Bypin U-
HO/VHO single pin plunger end
HO/VHO single pin fixed end
Tube alignment mark
HO/VHO single pin fixed end
How to Replace Fluorescent Tubes
A fluorescent tube should always be replaced with the same diameter bulb. The lampholders are made of plastic, so be careful not to break them when replacing these bulbs. Turn off the light switch before replacing bulbs. If you have difficulty gripping the bulb, use rubber gloves.
Tombstone bipin
- To remove the bulb, gently rotate 1/4 turn in either direction. If they don’t turn easily, reverse the direction of rotation to see if it turns more easily. Increase pressure while rotating the bulb until it is removed.
- Insert a new bulb into the lampholders. Make sure the bulb is all the way into the lampholders and gently rotate 1/4 turn in either direction (bulbs usually have alignment marks to indicate proper rotation).
Bipin and tall bypin
- To remove the bulb, gently rotate 1/4 turn in either direction.
- Insert the tube pins on the same side of each of the lampholders. Make sure the bulb is all the way into the lampholders and gently rotate 1/4 turn. As the tube is rotating, insert the pins into the other side of the lampholders. (Use alignment marks to indicate the tube is set properly).
Bypin U-
- To remove the bulb, gently lift the tube straight out.
- Insert all four tube pins on top of the lampholders. Gently push the tube into the lampholders. These lampholders have tension that will hold the tube in place after the tub is inserted (no rotating of the tube is needed).
Type HO Tombstones
One of the two lampholders is spring loaded.
- To remove the bulb, push the tube toward the spring loaded lampholder and remove the tube at the other lampholder. Then remove the lamp from the spring loaded end.
- To install, insert a tube end into the spring loaded lampholder and push in. This will allow the other end of the tube to be inserted into the other holder.