Balance arm piano lamps have an adjustable folding arm to direct light right at the essential spot. Musicians use them to shed light on sheet music and piano keys in venues with all types of other lighting. Where overhead lighting fails, this type of lamp is a portable solution for performance lighting needs.
A balance arm piano lamp is specially constructed to always counteract the force of gravity. No matter which position a pianist places it, they will continue to stand and direct light at the right areas. They are lightweight and portable so they can be taken anywhere extra light is required.
There is a good reason for its name. A balance arm works much like a human arm. The lamp cap is like the hand and there are three joints connecting it to the base, or body. Balance arm piano lamps take advantage of the three joints just like a human arm. Thanks to its jointed construction, it can reach almost any point within the hemisphere of the radium of the lamp arm's length.
The four basic parts are called the lamp cap, the lamp forearm, the upper arm and the base. These parts work seamlessly together to target light where a pianist needs it most. No matter how dark the performance venue might be, performers get the focused lighting they require with this type of lamp.
Different methods create the delicate gravitational balance achieved by balance arm piano lamps. The concept involves a bit of scientific theory and physics. Basically speaking, either springs or counterweights are used for balance.
Some balance arm lamps have coil springs that work in parallel on both side of the pivoting lamp arm. These set of springs function in a similar way to a single spring. Springs also minimize noise and make it easier to position the lamps to a certain spot. Certain springs might make a noise which is difficult to hear over the buzz of a busy concert hall.
Other balance arm piano lamps use counterweights to keep the light from tipping over. Another way to keep these lamps properly balanced is friction. Friction between the parts helps to maintain overall balance. Mechanical solutions are also sometimes used to create these lamps including hydraulics, pneumatic arms and coupling.
Balance arm piano lamps are very versatile and portable so they are often used for other purposes. From drawing boards to art studios to busy offices, they offer essential light for many different types of performers.