When it comes to the meticulous world of chandelier restoration, we often find that the difference between a "good" job and a "masterpiece" lies in the smallest of measurements. As the UK's leading manufacturer of bespoke candle tubes, we at Candle Tubes UK have seen it all: from grand heritage fixtures in country estates to cherished family heirlooms. One component that consistently proves its worth in our workshop is the adjustable E14 lampholder, specifically the variants featuring a 22.5mm base height.
If you’ve ever wrestled with a multi-arm chandelier where the "candles" seem to sit at slightly different heights (a common frustration, believe us!), you’ll know why precision is paramount. This post, the third in our E14 series, dives deep into why our new 22.5mm adjustable lampholders are the secret weapon for achieving that perfectly snug, professional look with 23mm and 24mm tubes.
Why Does the 22.5mm Height Matter?
In the lighting industry, we often deal with "standard" parts that don’t quite fit the non-standard reality of antique fixtures. A standard fixed lampholder might be too tall, leaving the bulb protruding awkwardly, or too short, making the candle tube look like it’s sinking into the bobeche (that’s the technical term for the ornamental cup at the base of the candle).
The 22.5mm base height of our adjustable E14 (Small Edison Screw or SES) lampholders is a bit of a "Goldilocks" measurement. It provides:
- Ample Internal Volume: Despite its compact exterior, it offers enough space for an "isostop" or insulation stop. This is vital for safety, particularly when dealing with heat-resistant sleeving and secure terminations.
- Class II Compatibility: For those working on double-insulated fittings where earthing isn’t present, this specific base depth is designed to maintain the necessary clearances for safety standards.
- A Low Profile: It sits comfortably within shallow cups, allowing the adjustable section to do the heavy lifting of height correction.

The "Snug Fit" Secret: 23mm and 24mm Tubes
One of the most frequent questions we receive is: "Which tube will fit my lampholder?"
When you are using an adjustable holder, you aren't just looking for a tube that fits over the top; you want a marriage of components. Our E14 adjustable holders are specifically engineered to work in harmony with our 23mm and 24mm diameter tubes.
Why these specific sizes? A 23mm tube offers a sleek, modern silhouette that fits closely to the lampholder body, preventing any unsightly wobbling. For those looking for a slightly more traditional or "weighted" look, the 24mm tube provides that extra millimetre of breathing room while still maintaining a professional, custom-fitted appearance.
Whether you are opting for our prestigious Quartz range for that icy, crystalline glow or our classic Card range for an authentic "wax drip" aesthetic, using a 22.5mm adjustable holder ensures the tube remains perfectly vertical and centred.

Achieving Visual Symmetry Across Multiple Arms
Lucky you if you are restoring a chandelier with twelve or more arms! However, the "wow" factor of a large fixture can be easily ruined if the bulbs aren't aligned. Over decades (or centuries), the metal arms of a chandelier can sag or warp ever so slightly.
By using an adjustable lampholder, you can "zero out" these discrepancies. You can set the height of each holder individually so that when the candle tubes and E14 LED bulbs are installed, the tips of the flames form a perfectly level ring of light. It is this attention to detail that separates a DIY repair from a professional restoration.
Top Tip: When adjusting the height, always measure from the base of the bobeche to the top of the lampholder rim. Use a "reckoner" (a simple marked stick or ruler) to ensure every arm is identical before you move on to the wiring.
Safety and the "Nasty Pinch"
We always advocate for a "safety-first" approach. When working with metal chandeliers, earthing is non-negotiable. Our adjustable holders often come with an integrated earthing bracket. This isn't just a compliance box-ticking exercise; it's about protecting yourself and the homeowner from potential electrical faults.
Ensure that your earth wire is securely bonded to the bracket. It might feel like a "nasty pinch" to fit everything into a tight space, but the peace of mind is worth the effort. If you’re ever unsure, we always recommend consulting a professional electrician: it’s not as complicated as it looks, but it must be done right.

Pairing with the Perfect Bulb
A high-precision lampholder deserves a high-quality bulb. To complete the look, we recommend modern LED flame-tip bulbs. These mimic the gentle flicker of a real candle without the fire hazard or the intense heat that can damage old card tubes or discolour delicate finishes.
Because our adjustable holders allow for fine-tuning, you can ensure that the "filament" of the LED bulb sits exactly where it would have on an original incandescent lamp, preserving the intended light refraction through the chandelier’s crystals.

How to Get the Perfect Measurement
Ready to start your restoration? To ensure you get the perfect match between your adjustable lampholder and your candle tubes, follow these steps:
- Measure your internal diameter: Ensure your bobeche/cup can accommodate a 23mm or 24mm tube.
- Check the entry thread: Most of our adjustable holders feature a 10mm (M10) or 1/2" entry. (Check your original part or send it to us for our digital measurement service!)
- Choose your material: Peruse our ranges of Metal, Card, Glass, and Nylon on our website.
- Consider the height: Use the adjustability of the E14 holder to find the "sweet spot" where the tube covers the holder entirely but allows the bulb to sit proud.
At Candle Tubes UK, we pride ourselves on being more than just a manufacturer; we are your partners in restoration. Our ability to create fully bespoke, made-to-order products means you never have to settle for "near enough."
For our international customers, you can find our full range and technical specifications on our dedicated domains: www.candletubes.co.uk, www.candletubes.com, and www.candletubes.eu.
Precision isn't just a goal; it's the standard. Happy restoring!

