Full-spectrum Ketra light for decorative, recessed and track fixtures
Ketra A20, S30 and S38 lamps extend the same full-spectrum light platform into decorative fixtures, recessed housings and track applications. Davis Audio & Video verifies the lamp, base, beam, enclosure, track hardware and HomeWorks infrastructure so a familiar screw-in form factor performs as part of a professionally designed lighting system.
Integrator guidance
A20 is the A-series shape for compatible pendants, sconces and table lamps. S30 is a PAR30 source for track and many five-inch recessed fixtures; S38 is the larger PAR38 source for compatible track and six-inch fixtures. All offer E26 or GU24 bases, but fit, enclosure and thermal conditions still require verification.
S30 and S38 Track Luminaires place those lamps in adjustable housings. Lutron lists H-Type track or 1/2-inch NPT canopy mounting, 90-degree tilt, nearly full rotation and optional snoots or baffles for cutoff.
These are not stand-alone smart bulbs. They require continuous 120-volt power, must not use a conventional line-voltage dimmer and communicate through Clear Connect Type X. Davis Audio & Video integrates them with HomeWorks QSX and clear keypad scenes.
Where Ketra lamps and track lighting are the right fit
A20 can bring Ketra control to compatible decorative fixtures without replacing the fixture with a proprietary recessed assembly. Socket, shade material, enclosure, lamp visibility and physical dimensions are checked before specification.
S30 and S38 provide directional beams for compatible recessed and track fixtures. Davis Audio & Video selects PAR size and beam angle around aperture, throw distance, target size and desired edge softness.
Track luminaires can be aimed as art, furniture or displays change. Snoots and baffles can improve cutoff, while Ketra scenes let the same installation support general viewing, detailed appreciation and evening ambiance.
A20, PAR lamps, downlights and Ketra linear products can share scenes, combining decorative glow, accent light and architectural illumination.
What a properly designed Ketra lamp system does better
A20, PAR30 and PAR38 are matched to the fixture rather than treated as brightness tiers. Shape, base, beam, output and enclosure determine the correct product.
Current lamps publish white light from 1,400K to 10,000K, saturated color and 0.1% dimming. Davis Audio & Video uses those ranges to build deliberate scenes rather than leaving every parameter exposed.
S30 offers beam choices from spot through extra-wide flood, while S38 covers spot through very-wide flood. Track accessories and aiming refine where the light begins, ends and causes glare.
The lamps fit compatible E26 or GU24 sockets, and S30/S38 track housings use replaceable lamps. Service access and replacement models are documented.
Professional design
A screw base does not guarantee suitability. Davis Audio & Video checks dimensions, base, socket, enclosure, environment and clearance. A20 is about 2.52 inches in diameter, S30 about 3.7 inches and S38 about 4.8 inches; each still needs the correct thermal and optical fit.
Current instructions require 120 V at 60 Hz and prohibit direct control by an AC line-voltage dimmer. Type X products need continuous power for reliable mesh operation, so existing dimmers and switches are reviewed.
Selected A20, S30 and S38 lamp SKUs may be allowed only in residential enclosed or covered-patio applications. Current S30 and S38 track luminaires are indoor damp-location products and are not for outdoor use. Davis Audio & Video verifies the exact SKU, enclosure, exposure and operating temperature.
How Ketra lamps fit into a Davis Audio & Video system
Residential Ketra uses HomeWorks QSX and Type X; Lutron's current comparison does not list Ketra under RadioRA 3.
Decorative, accent and architectural layers can share scenes while retaining the optic and output appropriate to each task.
Compatible shades can manage glare and privacy in the same scene while daylight and electric light remain independently adjustable.
A supported automation system can call approved HomeWorks scenes while Lutron retains detailed lamp and keypad control.
Specifications
The specifications below reflect current first-party Lutron information reviewed July 31, 2026. Output, beam, base, environmental rating and accessory support vary by model, so Davis Audio & Video confirms the exact lamp and fixture combination before proposal.
| A20 | A-series lamp for compatible decorative fixtures; E26 or GU24; omni-directional or semi-directional; current models list 648 lm at 7.6 W and 853 lm at 8.8 W |
|---|---|
| S30 | PAR30 for compatible track and 5 in recessed fixtures; 1,100 lm; E26 or GU24; 14.5 W standard or 12 W high-efficiency |
| S38 | PAR38 for compatible track and 6 in recessed fixtures; 1,100 lm; E26 or GU24; 14.1 W standard or 12.3 W high-efficiency |
| S30 Track Luminaire | S30 lamp housing for H-Type track or 1/2 in NPT canopy mount; 90-degree tilt, nearly full rotation and optional optical accessories |
| S38 Track Luminaire | S38 lamp housing for H-Type track or 1/2 in NPT canopy mount; 90-degree tilt, nearly full rotation and optional optical accessories |
| White-light range | 1,400K-10,000K |
|---|---|
| Published color range | 16.7 million saturated and pastel colors |
| Color rendering | 90+ CRI from 2,700K-5,000K; R9 greater than 90 on current product pages |
| Dimming | 0.1%-100% through compatible Lutron control |
| Rated life | 50,000 hours to L70 under published conditions |
| Control | Clear Connect Type X; lamps require continuous 120 V power and are not directly controlled by an AC line-voltage dimmer |
| S30 beam choices | 15-degree spot, 25-degree flood, 40-degree wide flood, 60-degree very-wide flood and 90-degree extra-wide flood |
|---|---|
| S38 beam choices | Four distributions from narrow spot through very-wide flood; verify the current lamp SKU and product submittal before ordering |
| Lamp environment | UL damp location, IP20; 32-122 F standard ambient range on current pages, with additional published extended-temperature conditions |
| Environmental use | Selected A20, S30 and S38 lamp SKUs may be allowed only in residential enclosed or covered-patio applications. Current S30 and S38 track luminaires are indoor damp-location products and are not for outdoor use; verify the exact SKU and exposure |
| Track accessories | Optional snoots and baffles for compatible S30 and S38 track luminaires |
Planning notes
Davis Audio & Video process
Davis Audio & Video reviews decorative fixtures, recessed housings, track, room use, art, shades and desired scenes.
We select form factor, output, beam, base, accessory, HomeWorks capacity and Type X gateway placement.
Continuous power, removal of incompatible dimming, track type, canopy mounting and code responsibilities are coordinated with the electrician.
Lamps are activated and grouped, track heads are aimed, keypad scenes are tuned and power-loss behavior is tested.
Davis Audio & Video explains scene control, records replacement details and remains available for aiming, programming and expansion.
FAQs
A20 serves compatible decorative fixtures. S30 is PAR30 for compatible track and many five-inch recessed fixtures. S38 is PAR38 for compatible track and six-inch fixtures.
Current pages list E26 and GU24. A matching base does not ensure fit; dimensions, enclosure, socket orientation and thermal conditions also matter.
Current A20 models list 648 or 853 lumens; S30 and S38 list 1,100 lumens. Surface illumination also depends on beam, distance and aiming.
No. Lutron prohibits direct control by an AC line-voltage dimmer. A20, S30 and S38 require continuous power and compatible digital control.
They are not stand-alone smart bulbs. Current residential Ketra installations use HomeWorks QSX and Clear Connect Type X.
Selected A20, S30 and S38 lamp SKUs may be permitted only in residential enclosed or covered-patio applications. Current S30 and S38 track luminaires are indoor damp-location products and are not for outdoor use. Davis Audio & Video verifies the exact SKU, enclosure and exposure.
Current pages list H-Type track and a 1/2-inch NPT canopy option. Track, voltage, feed and mechanical fit must be confirmed.
Yes. Current track heads provide 90-degree tilt and nearly full rotation, with optional snoots and baffles. Beam, distance, glare and the sensitivity of the displayed material should be considered together.
Yes. Current product pages publish white light from 1,400K to 10,000K plus 16.7 million saturated and pastel colors. Davis Audio & Video typically prioritizes useful white-light and scene behavior before specialty color effects.
Related Davis Audio & Video resources
Next step
Davis Audio & Video can help match products to wiring, control, acoustics, networking, mounting, calibration and long-term support.