--- title: "Fixed Beam or Zoom Track Spotlight: How to Specify the Right Optic" url: https://www.kinghaotai.com/resources/fixed-beam-vs-zoom-track-spotlights/ markdown_url: https://www.kinghaotai.com/resources/fixed-beam-vs-zoom-track-spotlights.md date: 2026-09-15 type: "Lighting design" summary: "Compare fixed 24° and 36° optics with adjustable zoom beams for retail and project lighting, including which option suits a given specification." language: en site: https://www.kinghaotai.com/ publisher: GUANGDONG HAOTAI LIGHTING CO., LTD. --- ## Direct answer A fixed optic delivers one repeatable beam — typically 24° or 36° — from every luminaire of that model, so a lighting layout behaves the same way in every store. A zoom optic can be adjusted on site, which means the beam is set against the real merchandise instead of being predicted on a drawing. The choice is really about whether the layout is known and permanent, or expected to change. ## What a fixed beam actually buys you Repeatability. If a layout is designed around a 24° optic at a given mounting height, every fitting of that model produces the same result, and the next store built from the same template matches the first. That predictability is worth a lot in a chain: it makes the drawing trustworthy, it removes a site decision, and it removes the risk that a beam was adjusted by whoever happened to be on the ladder. Fixed optics are also mechanically simpler — no moving beam mechanism to set, lock and later check. ## What a zoom beam buys you Adjustment without re-specification. A zoom optic covers a range rather than a point, so one model can frame a tight product shot on a shelf today and a wider wash after the display changes. For shops, galleries and exhibitions that re-merchandise regularly, that flexibility is the whole reason to pay for it. There is a second, less obvious benefit for distributors: a zoom product covers several beam requirements with fewer SKUs. The trade-off is that a zoom mechanism is a mechanical assembly, so compare system output, body size and price against a fixed optic of the equivalent class rather than assuming parity. ## The two approaches in the HAOTAI range | | Fixed beam | Zoom beam | |---|---|---| | Series | TL01, TL02, TL03 | TL04, TL05 | | Beam | 24° / 36° | TL04: 20°–55° · TL05: 15°–55° | | Sizes | TL01 12–40 W Ø50–Ø90 mm · TL02 15–35 W Ø65–Ø85 mm · TL03 20–40 W Ø80–Ø100 mm | TL04 15 W / 25 W Ø80 / Ø100 mm · TL05 15–35 W Ø65–Ø85 mm | | Body depth | Depends on model; TL03 is the compact range | TL04 is the flattest at Ø80 × 46 mm and Ø100 × 47 mm | | Beam set | In the specification | On site | | Best where | The layout is designed, repeated and fixed | The display changes, or the beam has to be judged in place | All series are supplied at CRI 90 with 2700 K / 3000 K / 4000 K options and IP20 for indoor use. Confirm the exact model and beam option for the current configuration before quotation. ## Choosing between them | Situation | Fixed beam | Zoom beam | |---|---|---| | Rollout of identical stores from one template | Preferred — every store matches | Workable, but the setting becomes a site variable that has to be controlled | | Merchandise that changes with seasons or campaigns | Re-specification each time | Preferred | | High ceilings where the beam must be judged by result | Hard to predict from a drawing | Preferred — set it on site against the target | | Tight, controlled accent on a fixed display | Preferred — a known beam, repeatably aimed | Not necessary | | A mixed project with several different throw distances | Needs several beam models | One model may cover the spread | | Distributor stock with limited SKU budget | More SKUs, lower unit cost | Fewer SKUs, higher unit cost | ## What to verify before ordering - **How the beam range is defined.** A quoted beam angle should be understood the same way on both sides — clarify whether it is the beam angle or the field angle, because the two differ. - **Repeatability of the zoom setting.** Ask how the beam is locked and whether it can be re-set to a known value after cleaning or maintenance. - **System output at the ends of the zoom range.** Output and distribution change across the range; compare the figures for the beam you will actually use. - **Body size and depth.** A zoom mechanism affects the body, which matters in shallow or exposed ceilings. - **Adapter and rail compatibility.** The optic choice does not change the fact that the rail, adapter and luminaire must be confirmed as one system — see the [track light selection guide](/resources/track-lights-selection-guide/). - **A physical sample.** For both options, aim the luminaire at the real target at the real mounting height before committing to a rollout. ## Frequently asked questions ### Is a zoom spotlight simply a better version of a fixed one? No, they solve different problems. A fixed optic is more predictable and mechanically simpler; a zoom optic is more flexible and defers the beam decision to the site. A permanent, templated layout is usually better served by fixed optics. ### Can I mix fixed and zoom luminaires on one rail? Yes, on the same platform, as long as the adapter matches that rail. Mixing is common: fixed optics for the standard runs and zoom where the display changes. ### Does a zoom mechanism reduce output? A zoom assembly contains more optical elements and moving parts than a fixed optic, so output, distribution and body size should be compared on the actual figures rather than assumed. Ask for the photometric data at the beam setting you will use. ### Which series should I pick for a shallow ceiling? The TL03 compact range and the TL04 series have the flattest bodies in the finished range, at Ø80 × 46 mm and Ø100 × 47 mm for TL04. Confirm the current dimension on the drawing, because body depth decides whether the luminaire clears the ceiling. ### What is the most common mistake with beam angles? Choosing the beam from the catalogue instead of from the mounting height and the size of the object being lit. A beam that looks correct at 3 m spreads too far at 5 m and produces visible spill and glare at 2.5 m.