TECHNICAL

Technical Terms & information

How to measure a lampshade

It is very important to supply us with the correct measurements when requesting a quote for a customer lampshade.

Always use the formula “top diameter x bottom diameter x vertical height”.

Do not measure the slant by resting your tape measure on the angle of the shade. Place your tape measure on the inside of the lampshade and measure from top to bottom on the vertical. Always ensure your lampshade is resting on a flat surface when doing so.

Lampholder Types

Not all bulbs work in a specific light fixture. It is therefore important to know the different characteristics of each bulb type in order to get the most out of your lighting and to avoid the dangers of using the wrong bulbs in your fixtures. Find below the two most commonly used lamp fitting types.

 

SA Bayonette Lamp Fitting:

  • Most commonly used in South Africa
  • Also referred to as BC / Bayonet / SA
  • Bulb “clips” and turns in
  • Smaller lampholder
  • More affordable

 

E27 / Euro Lamp Fitting:

  • Most commonly used overseas
  • Also referred to as ES / Screw in
  • Bulb screws in
  • Larger lampholder
  • More expensive

 

Washer Types

The washer, also known as the shade ring, is welded to the lampshade and forms part of the fitting that connects to the lampholder of the lamp base.

Not all washers are interchangable with different lampholders. One must clearly know the difference between the 2 most commonly used washers to allow your lampshade to fit onto your lamp base properly

Should you order lampshades manufactured with E27 washers in error, one can purchase “converters” from us that clip onto the existing E27 washer to convert it to a SA washer instead. This is a cheaper alternative than remaking the lampshade.

SA Washer

  • Most commonly used in South Africa
  • Also referred to as BC / Bayonet
  • Fits onto a bayonet lampholder

E27 Washer

  • Most commonly used overseas
  • Also referred to as ES / Screw in
  • Fits onto an E27 / Euro lampholder

Lampshade Types

Pleated Shade Types

Fitting Types

Top Fit

Used mostly on pendant shades where the fitting is at the top of the lampshade

Cone Fit

Used mostly with tapered shades. Allows for stacking and therefore advisable for large volumes being transported

Bottom Fit

Used mostly with drums or shades that have the same top and bottom diameter. Not advisable for large volumes being shipped as they cant stack.

Candle Clip

Used for lampshades that clip onto the top of candle globe. Commonly found on chandeliers etc

Dual Clip

Used for lampshades that clip onto the top of normal golf ball globe. Commonly found on chandeliers etc

Glossary of terms

BIAS

A separate trim sewn onto the top and bottom of a lampshade. Often used on more classic styled lampshades

Candle Clip

See “Fitting Types”

CSF

Customer Supply Fabric will be stated on quotes when the client wishes to send their own fabric

Cabtyre

Electrical PVC cable used for wiring pendants. Standard colours are black and white

E27

See “Lampholder Types”

Horizontal Weave

The weave pattern forming horizontal strips of fibre. This method of weaving is quite labour intensive and requires more material and is therefore more expensive than random weave

Lampholder

See “Lampholder Types”

MOQ

Minimum Order Quantity

PVC Lining

PVC is used on the inside of lampshade to keep the shape rigid. We stock clear or white in two thicknesses. 350micron is used on smaller lampshades and 500micron is used on larger lampshades. Clear PVC is commonly used for more atmospheric lighting and allows more light to shine through the fabric. White PVC diffuses the light up and down of the shade and is often therefore used for more functional lighting

Pongee Lining

A fabric lining used on the inside of pleated shades where PVC cant be used

Pendant

A hanging light

Pleats

Folds in the fabric used to cover the lampshade. See “Pleated Shade Types”

Random Weave

A more commonly used style of weave that follows no specific pattern. The more affordable alternative

 

RGD Frame

A rigid frame (RGD) comprises of a lampshade that has vertical struts connecting the ring and fitting. It replaces the function of the PVC as is generally used for pleated or woven shades where the framework needs to have a support structure

Recess

Recess refers to the space in mm between the base of the shade and the shade ring. This measurement is important as it is used to conceal the lampholder

Soutach

A braid / detailed trim glued onto the lampshade after manufacture to add detail

SA / Bayonette

See “Lampholder Types”

Shade ring

See “Washer Types”

Self fold

Refers to the same fabric used on the lampshade folded back over the top and bottom of the shade to form a trim. Used commonly on pleated shades to give a finished look

Tuck

The lampshade fabric is wrapped over the top and bottom of the shade and tucked around the wire

CONTACT US

Showroom Hours

Mon to Thur: 8:00 to 16:30pm.

Friday: 8:00 to 14:30pm

Call Us

Tel: +27 (21) 950 6960
Fax: +27 (21) 945 1202

Factory Hours

Mon to Thur: 7:30 to 16:30pm.

Friday: 7:30 to 14:30pm

Email Us

enquiries@wireworld.co.za