1, material aspects
The bulbs of ordinary incandescent lamps are easily rusted by white iron. The lamps of better quality are generally made of aluminum alloy, which is not easy to rust.
2, the filament aspect
A good luminaire is a double tungsten wire, and a poor luminaire generally uses a single tungsten wire.
3, brightness
For the lamp, if the lamp is a one-time application of the powder, the brightness is uniform after the power is turned on, and the difference is artificially powdered, and the brightness is uneven.
4, the price aspect
Don't just buy a light when buying a fixture, because quality and price are definitely proportional.
5. Certification
It depends on the right 3C certification and its content is reviewed.
6, old and new aspects
The novel products are not necessarily mature in technology. Don't just pick the latest ones when buying, and ignore the old models.
72# Ferro Silicon,Lump Ferro Silicon 72#,72# For Steelmaking,Refractory Mineral Ferro Silicon
NINGXIA HELANSHAN METALLURGY CO., LTD. , http://www.nxhlsyjferrosilicon.com