A light emitting device includes a plurality of unit light emitting regions on a substrate. At least one of the unit light emitting regions includes at least one pair of first and second electrodes that are spaced apart, at least one first bar-type LED in a first layer on the substrate, and at least one second bar-type LED in a second layer on the substrate. At least one of the first bar-type LED or the second bar-type LED is electrically connected between the first electrode and the second electrode.

A light-emitting device includes a carrier with a first surface and a second surface opposite to the first surface; and a light-emitting unit disposed on the first surface and configured to emit a light toward but not passing through the first surface. When emitting the light, the light-emitting device has a first light intensity above the first surface, and a second light intensity under the second surface, a ratio of the first light intensity to the second light intensity is in a range of 29.

An LED light bulb comprises an LED filament configured for emitting omnidirectional light. The filament comprises a linear array of LED chips operably interconnected to emit light upon energization, a conductive electrode electrically connected with the linear array of LED chips, and a light conversion coating enclosing the linear array of the LED chip and the electrode. The light conversion coating includes a top layer and a base layer conformally interconnected to form a unitary enclosure. The top layer is coated on a first side of the linear array of LED chips and the electrode. The base layer is coated on a second side of the linear array of LED chips and the electrode. A first LED chip in the linear array of LED chips is guided by the unitary enclosure to a different angle in relation to a second LED chip in the linear array of the LED chips.

A light includes a housing having a lens, a bottom cover, and a middle cover positioned between the lens and the bottom cover. The lens, the bottom cover, and the middle cover cooperate to form a water-tight space. The light additionally includes a chimney having a hollow tube extending from a bottom of the housing to a top of the housing, a heat sink coupled to the chimney and positioned within the lens, and one or more LEDs coupled to the heat sink to emit light through the lens. The light also includes a circuit board positioned within the water-tight space and coupled to the one or more LEDs to control operation of the light.

Implementations generally relate to facilitating use of high volume, highly standardized low cost components, with a minimum of specialty components, in the manufacture of light emitting diode (LED) light fixtures. In some embodiments, an apparatus for providing LED lighting includes a physical form having a predetermined shape, where the form is configured to support at least one LED strip thereto, and where the predetermined shape causes the at least one LED strip to be so configured as to emit light in a predetermined emission pattern when the at least one LED strip is coupled to the physical form. The apparatus further includes at least one constraint mechanism, where the at least one constraint mechanism, in whole or in part, constrains the at least one LED strip to remain configured to its predetermined shape.

In one embodiment, an LED lamp has a generally bulb shape. The LEDs are low power types and are encapsulated in thin, narrow, flexible strips. The LEDs are connected in series in the strips to drop a desired voltage. The strips are affixed to the outer surface of a bulb form to provide structure to the lamp. The strips are connected in parallel to a power supply, which may be housed in the lamp. Since many low power LEDs are used and are spread out over a large surface area, there is no need for a large metal heat sink. Further, the light emission is similar to that of an incandescent bulb. In other embodiment, there is no bulb form and the strips are bendable to have a variety of shapes. In another embodiment, a light sheet is bent to provide 360 degrees of light emission. Many other embodiments are described.

An LED light bulb includes a bulb shell, a bulb base, a stem, conductive supports, an LED filament, and a supporting arm. The bulb base is connected to the bulb shell. The stem is connected to the bulb base. The conductive supports are connected to the stem. The LED filament includes a filament body and two conductive electrodes. The conductive electrodes are at two ends of the filament body and connected to the conductive supports. The filament body is around the stem. The supporting arm is connected to the stem and the filament body. In a height direction of the LED light bulb, H is a distance from a bottom to a top of the bulb shell. A first height difference is defined between the two conductive electrodes and is from 0 to 1/10H. The filament body is curved to form a highest point and a lowest point. A second height difference is defined between the highest point and the lowest point. The first height difference is less than the second height difference.

An elongated lighting apparatus includes an elongated housing and one or more elongated light source. The elongated light sources are inside the housing. Each elongated light source is coupled with at least one elongated lens on the housing. There is a means mounted on the housing for adjusting the direction, or the beam angle, or both, of the light emitted out of the at least one elongated lens. The at least one elongated lens and the elongated housing may be coated with an anti-bacterial photocatalytic film that can be activated by visible light.

A light bulb includes a base, a filament coupled to the base and a cover covering the filament. The filament includes a transparent structure, optoelectronic units arranged on the transparent structure in sequence, each including a side surface, a first and second bonding pad formed on a top side of one of the optoelectronic units, a third and fourth bonding pad formed on a top side of another optoelectronic unit, conductive elements, one of the conductive elements including a bottom surface directly connecting the first and third bonding pads without covering the side surfaces of the one and the another of the optoelectronic units, and a top surface opposite to the bottom surface, the transparent structure continuously covering the optoelectronic units and the conductive elements without directly contacting the top surfaces of the conductive elements, first and seconds terminal electrically connected to the optoelectronic units.

Disclosed is a LED strip for providing indirect light emission. The LED strip comprises a plurality of LEDs arranged on an upper surface, wherein the LED strip has an unfolded state and a folded state, the LED strip being substantially planar in the unfolded state. The LED strip comprises a first side and a second side opposite to the first side, the first and second side being parallel to a central longitudinal axis in the unfolded state. The LED strip in the folded state has a plurality of first loops comprising at least one opening and being provided with at least one of the plurality of LEDs, which is configured to emit light towards a reflective interior surface of the loop, whereby at least a portion of the light reflected from the reflective interior surface may exit the at least one opening of each loop.