Allenglade Crystal Chandelier

K9 is an optical-grade borosilicate glass with a high refractive index — close to that of lead crystal but without the lead content. The "K9" designation refers to the specific glass composition used in precision optical applications. When cut with multiple facets, K9 crystal breaks white light into distinct prismatic color bands and scatters them across surrounding surfaces. It is the standard material used in quality decorative crystal chandeliers and is significantly clearer and more refractive than standard float glass.

Ceiling height is the primary constraint. The 5-head (H 65 cm) and 6-head (H 95 cm) work in standard residential rooms with 2.6–2.8 m ceilings. The 8-head (H 120 cm) requires at least 3.2 m. The 12-head (H 160 cm) is designed for grand spaces with 4 m or more of ceiling clearance — entryways, stairwells, and formal dining rooms with high ceilings. For diameter: as a rule of thumb, the chandelier diameter (in cm) should be roughly half the shortest room dimension (in cm) for good visual proportion.

For maximum prismatic effect, use a clear glass LED candelabra bulb (E12/E14) with a visible filament — the point-source light of a filament-style bulb produces sharper, more defined prismatic scatter through the K9 facets than a frosted diffuser. A warm white 2700K color temperature enhances the antique gold frame. Wattage: 2–4W LED per socket is sufficient — the crystal multiplies and scatters the light across the room, making high wattage unnecessary. Bulbs are not included.

Turn off and allow the fixture to cool fully before cleaning. For light dust, use a clean dry microfiber cloth or a clean soft-bristle brush to dust individual crystals — do not spray any liquid directly onto the fixture. For deeper cleaning, individual crystal pendants can be removed from the chains, wiped with a damp cloth and a small amount of glass cleaner, then dried before rehanging. Avoid any cleaner containing ammonia on the antique gold frame — it will strip the finish.