Need to remove a broken key from a cylinder lock. Take a coping saw blade and break off one end pin, then grind a slight taper on the back side of the blade. Insert into the cylinder so that the blade's teeth grab the notches on the broken key and pull out the broken piece.
If you need to limit access to someone whom you trusted with a key--purposely break of a key that fits the lock and push into the cylinder--no other key can be inserted--the above tool lets you remove it when you want access. We used this trick to "lockout" tenants (illegal of course) when we needed to dunn them for overdue rent. Whose to say how a key got broken in the lock.
I am a electrician the florescent lights you are talking about are not very efficient compared to the new ones.
They were more than likely T12 bulbs, they will be removed form the markets soon just like the incandescent bulbs.
They will only be T8 bulbs available. There will also be a T5 bulb but they are more expensive and less efficient.
We have a contract with Orion lighting they make high bay fluorescent lighting. When we go into a facility and change out there old light with our new ones, it is twice as bright and only use about 1/4 of the power.
The last plant we did we change out 168 lights for about 38000dollars and in about a year and nine months they will recoup all of there investment in monthly energy savings.
They make fluorescent that will go in -40 and start with no problem every time. Technology changes every day. Soon the incandescent bulbs with be a thing of the past.
The screw in fluorescent bulbs use about a 1/4 of the energy as a incandescent bulb. A 26watt fluorescent is the same as 100w incandescent bulb.
Now you can get fluorescent bulb with a higher color rendering factor. The use a scale in K's a 3500k is a yellow light like a incandescent bulb. A 5000k is more like sun light. The real sun is 10000K. The 5000K make a big difference when you are trying to work on things and need good light compared to that old yellowish light.
The 8' fluorescent bulbs are also obsolete.
The other reason you hear homing and the bulbs pulse is because the old lights that you are talking about are magnetic ballast, they do not make them any more either. All of the new fixture use electronic ballast that do not hum or pulse and are quick starting.
My advise get a good electrician or a electrical supply house and have them look at your current lighting and see what they recommend. You might be surprised to find how much money you could save and how much fluorescent lighting has changed.
A good electrician should be able to replace your current lighting one for one and save you at least half the energy and get twice the light and a better quality of light.
I hope I enlightened you on fluorescent lighting. If any thing I said was unclear just ask and I will try to help.
