Many engineering buyers struggle to decide whether to pick an aluminium or plastic housing for industrial bulkhead light. Over my years in export sales, I have supplied both types for countless projects. Neither option is universally superior; the right choice depends on site conditions. Even with quality light sources and solid IP ratings, a mismatched housing will fail quickly under harsh working conditions.
Pros and cons of powder-coated aluminium housings
Aluminium housings offer high rigidity and excellent impact resistance, and can easily reach IK10 ratings. They work well in workshops and loading bays with frequent forklift movement and risk of knocks from goods. They also deliver reliable heat dissipation. Stable temperature rise during long continuous operation helps extend the lifespan of light components. However, there is a clear downside: once the coating is scratched, aluminium is prone to rust in salt-spray or chemical vapour environments. It is also heavier, meaning mounting brackets need sufficient load capacity. Keep this in mind when sourcing a led bulkhead light.
Pros and cons of modified plastic (PC) housings
The plastic we refer to here is industrial-grade modified PC, not low-grade recycled plastic. PC housings are lightweight and naturally resistant to acid, alkali and corrosion. They are a low-maintenance option for humid workshops, food washdown areas and coastal sites, with no rust risk. They are usually more cost-effective for large-scale rollouts. The trade-off is a lower impact limit compared to aluminium. Poor-quality PC will yellow and turn brittle under prolonged sunlight. For permanent outdoor installation, an outdoor bulkhead light must use UV-stabilised virgin PC material.
Quick selection guide for different working zones
- High-impact zones: forklift aisles, production lines and material storage areas. Aluminium housings are preferred for better knock resistance.
- Corrosive and humid zones: food processing plants, printing workshops and coastal facilities. Modified PC housings avoid rust issues.
- Standard indoor factory corridors and stairwells: both housing types are acceptable. Decide based on budget and project specifications.
Common pitfalls to avoid
First, do not dismiss plastic housings outright. Always distinguish virgin PC from recycled material; recycled PC ages rapidly.
Second, check the coating process for aluminium housings. High-quality electrostatic powder coating improves salt spray resistance, while ordinary paint provides weak protection.
Third, the housing is only one part of the whole fixture. Whether aluminium or PC, reliable gaskets are required to maintain the rated performance of an IP65 bulkhead light or IP66 bulkhead light.
Final thoughts
Aluminium excels at impact resistance and heat dissipation, while modified PC stands out for corrosion resistance, light weight and competitive pricing. Do not simply choose the more expensive option; match the housing to on-site impact and corrosion risks.
Send over your project conditions or installation drawings, and I can compare housing options, recommend suitable models and strike a good balance between budget and long-term reliability.
