Short answer: Decide where the stud sits (centre line or edge line), then match load capacity, IP rating, light output and the solar/battery system to that position. For highway and city-road use that usually means a die-cast aluminium body, IP68 sealing, and a load rating high enough for centre-line installation — for example the UKEN UK-G105 (123 × 50 mm, IP68, above 80 tonnes, 3.2 V / 1000 mAh lithium, 8-hour full charge, beyond 800 m visual distance, CE / RoHS / FCC).
g105 solar road stud
Know which product family you need
Passive reflective studs (cat-eyes) return headlamp light and cost little, but their reflectivity fades with wear and grime — studies of reflective raised pavement markers report roughly 90% loss of initial reflectance within 6 to 12 months. Active solar studs emit their own light, so they stay visible on unlit roads, at long range and in rain. Embedded (in-ground) studs are recessed into the pavement, so they survive tyres and plough blades and can be used on the centre line. If your road is unlit, or traffic drives over the marker line, you want the active embedded type.
Decide the installation position first
Ask one question: will vehicles drive over the stud, or only pass beside it? An edge-line stud sees occasional stray loads; a centre-line stud on a freight corridor is driven over by every axle. Note the traffic mix, design speed, lane count and rainfall pattern before requesting quotes — every later decision follows from those.
Match load capacity to real axle weights
Ratings in this category typically run around 20, 30 and 50 tonnes, with heavy-duty parts above 80 tonnes. A static compression figure is not a fatigue rating, so ask for the test method behind it, and treat the number as meaningful only relative to the placement. The UK-G105 is rated above 80 tonnes and specified for centre-of-road installation — that is the class to compare against on truck routes.
Check the seal and the housing
IP68 is the level for an embedded stud: dust-tight, and rated for continuous immersion rather than splashing. Ask for the model-specific IP68 test report covering the assembled unit, not a brand-level certificate.
On materials, ask which parts are die-cast aluminium and which are plastic. The heavy-duty pattern is a die-cast aluminium alloy body with a polycarbonate lens: the metal carries the load, the PC window protects the LEDs and panel. Cheaper markers use ABS or plain plastic bodies — serviceable at low speed, prone to deformation under heavy axles. Ask about corrosion treatment as well, especially for coastal, salted or humid markets.
Size, profile and installation
The UK-G105 measures 123 × 50 mm. The footprint fixes the core bit and pocket tolerance; the protrusion above the finished surface decides exposure to ploughs, sweepers and motorcycle tyres. Get the profile drawing and the recommended installation depth before mobilising a crew.
Examine the power system
Four numbers matter. Full-charge time — 8 hours on this model; ask for the winter-sun figure at your latitude. Battery capacity and chemistry — 3.2 V / 1000 mAh lithium here, useful only if the panel can refill it inside the daylight window. Autonomy — how many consecutive overcast days it keeps emitting at specification, stated in hours at a defined LED mode. Working mode — steady-on for continuous delineation, flashing for lower current draw and longer-range attention. A supplier who cannot state autonomy has not tested the product.
Verify visibility and certifications
A figure such as “over 800 m” is a best case: dark night, clean lens, direct line of sight. Ask how it was measured, and compare it against your design standard rather than the catalogue.
Baseline certification is CE, RoHS and FCC plus the IP68 report. If your tender cites a standard by number, the two names appearing most often internationally are ASTM D4280 for raised retroreflective pavement markers and EN 1463 for retroreflecting road studs; internally illuminated markers are assessed under their own performance families. Ask for a written compliance statement against the exact part number.
Choose the colour, then match the climate
White and yellow are used for lane and centre-line delineation, red for hazard and do-not-cross markings, green for crossings, ramps and merge zones, blue for special-purpose lanes — but confirm permitted colours with your road authority, because conventions differ between markets.
Ask every supplier two climate questions: low-temperature battery discharge performance, and panel output derating at high ambient temperature. Both decide whether the stud still meets its nighttime duty in the worst month of the year. This product’s principal markets — South Korea, Thailand, Venezuela, the Philippines and the United States — cover monsoon rain, tropical UV, coastal salt air and temperate winter conditions. If your site differs sharply, say so and ask what changes.
Evaluate the supplier, then test a sample
Check how long the supplier has traded in this category, store rating and review volume, response speed, on-time delivery and repeat purchase rate — repeat buyers here are usually contractors who would not return after a failed installation.
Then order a sample and run three checks: an immersion check for the IP68 claim; the stated charge period in sun followed by a timed discharge in darkness, on more than one unit; and a night-time visual check at your approach speed on a real road section.
Packaging and lead time
The UK-G105 ships singly in a 14 × 14 × 6 cm box at 0.7 kg — compact enough for economical carton consolidation. Processing runs about five days at small quantities and around seven days in the low thousands, with larger volumes quoted on request. Customised packaging is available from 500 units, so confirm the minimum order quantity, the artwork specification and the sampling lead time at quotation stage.
g105 solar road stud
Frequently asked questions
Are active solar studs worth more than passive cat-eyes? They are not substitutes. Passive markers are cheaper but lose most of their reflectivity within a year; active studs stay visible regardless of wear. Choose by whether your road is lit and how fast traffic approaches.
What does IP68 actually mean here? Dust-tight plus continuous immersion protection — the right level for a product permanently sitting in a wet road surface. Insist on a model-level test report.
Do they need wiring or maintenance? No wiring; maintenance is limited to cleaning the panel and lens. The battery is the wear item, which is why the sample discharge test matters most.
Which colour should I order? By function, not preference — and within your road authority’s permitted palette, since colour conventions differ between countries.
How do I compare similar quotes? Line them up on load rating and its test method, model-level IP68 report, housing construction and corrosion treatment, battery capacity against panel output at your latitude, and the supplier’s repeat purchase and on-time delivery record. Unit cost is the last consideration, not the first.
