C9 vs C7 bulbs for commercial installs

C9 bulb specs

C9 bulbs are the larger of the two — roughly the size of a strawberry — with a standard E17 or E26 base depending on the manufacturer. Commercial-grade C9 LED bulbs use SMD LED technology with a sealed lens and fully-encapsulated base, rated for tens of thousands of hours of service life.

C9 is the standard for the primary architectural line on commercial installs (rooflines, gable edges, parapet caps, building perimeters). At 12-inch spacing on a primary run, C9 bulbs read as a clean line of light from up to 200 feet away — the visibility that commercial properties are paying for.

C7 bulb specs

C7 bulbs are the smaller of the two — roughly the size of a night-light bulb — with a standard E17 base (candelabra base). Commercial-grade C7 LED bulbs use the same SMD LED technology as C9 with a smaller sealed lens.

C7 is used on secondary architectural features (window frames, columns, entry arches, planter beds) and on installs where a smaller light footprint is the design brief. On tight architectural details, C7's smaller footprint reads cleaner than C9 while still throwing enough light to be visible from ground view.

Standard commercial install pattern

Most commercial installs use C9 on the primary architectural line and C7 as accent lighting on secondary features. A shopping-center install might run C9 on the parapet along the full building perimeter with C7 on the entry arch, above the signage line, and along column bases.

Some commercial installs use only C9 across the entire property. This is common on installs where the design brief prioritizes visibility and consistency over architectural detail — HOA common areas, business-park perimeters, municipal displays.

Color temperature selection on commercial installs

Warm White (2700K-3000K) is the default for traditional-look commercial installs. It reads as the familiar 'warm' Christmas light color across every ground-view distance.

Sun Warm White (2600K) is warmer than standard Warm White — reads slightly more amber. Used on installs designed to complement warm-toned exterior architecture (brick, warm-tone stucco).

Pure White (5000K-6500K) is cooler than Warm White — reads brighter and more modern. Used on installs designed to complement cool-toned architecture (glass, gray stone, modern buildings).

Multicolor bulbs are used on installs that want a distinct 'holiday' visual rather than an architectural-uplighting look. Common on retail centers, restaurants, and family-entertainment venues.