LED Filament Bulb (General Lighting - ST Series), is another standard shape bulb of general lighting and decorative purpose. It has a wide range of residential or commercial lighting applications. ST series filament bulb are generally known as straight tubular bulb, they have 2 common shapes, including ST58 and ST64. They are also known as ST19 and ST21 respectively in US. ST Series bulb have similar size with A series, as well as similar power rating and usage. The most common power rating are 4W, 6W and 8W. And long filament of length 64mm could be used for better outlook compare.
LED filament bulb is good replacement product of traditional Edison, Incandescent, Halogen as well as CFL bulb. Traditional bulb usually employs high power, which could be as high as 100W while LED could create similar brightness using only 1/10 power rating. Besides from the energy saving edges, LED filament bulb also have design which could create a lighting effect closer to Edison bulb with more antique lighting effect compare to SMD bulb. The warm color lighting effect is very attractive to Europe, North America, Latin America as well as Australia market for general lighting purpose. It is particular safe and reliable, as well as being the most commonly used indoor lighting product. The product certified by TUV and SGS with CE, RoHS, ERP, SAA, and are fully compatible with CB | NOM | S-MART | TISI requirement.
Our filament bulb uses a fully encapsuled ceramic filament base with high quality Sanan & Epistar chips. The whole lamp has a high lighting efficacy of (100lm/W – 120lm/W) and color rendering (CRI80-95). We offer full range of color temperature, ranging from 2700-6500K. The product beam angle is 360°.
For bulb body, it is optional to use the most common clear glass to achieve higher brightness. If it is preferable to have more diffused light effect, a semitransparent frosted glass body or an opal glass of white powder coated will be available. The base cap could either be Edison screw or bayonet type. They can be of size E26 | E27 | B22d. The base cap could be made of aluminum in slivery color or copper in golden color.
LED filament bulb use high quality Linear IC or IC driver to power on, which could be single voltage input (AC120V or 230V) of power factor >0.5, or universal voltage input (AC85-265V) of power factor >0.9. It is optional to use driver solution which is dimmable, including linear IC dimmable model, or SMPS dimmable model. For higher compatibility with different dimmer model and brand, we could use chips LC dimming as well as 1512 chips IC dimming driver model. In case of DC input is preferable, the bulb could be customized for DC3-12V input. The lifetime of the product is over 25,000 hours, with a warrant period of 2 years.
Filament bulb could have a wide range of applications. They can be use in home fixtures such as ceiling lamp or decorative light at home. In hotels or inns, and so as shopping malls and shops, there are usually infused ceiling fixture with silvery light refractor which opal filament bulb could create a bright and focused light effect. For bars, cafes & restaurants, there are usually decorative lamp fixtures such as metallic pendant as well as hanging lamp base with different reflector design. To create a most desirable atmosphere for customer, a warm light comping from 360° clear glass bulb will always be the best option. Filament bulb could also be used in art galleries, libraries and theaters to give a comfortable, home like atmosphere for leisure or social activities.