Lighting device and method of manufacturing it

1. A lighting device, comprising:

a channel-shaped elongate profiled body having a central portion and two side portions sidewise of said central portion, said profiled body with mutually opposed undercuts opening inwardly of the channel shape of the profiled body said undercuts extending lengthwise of the profiled body, and

a light radiation source assembly including an elongate support board with at least one electrically-powered light radiation source thereon, said support board having longitudinal sides extending into said undercuts, wherein the light radiation source assembly is retained by said channel-shaped profiled body; and

a second sealing mass, with said second mass extending over a face of said support board opposed to said central portion from the one to the other of said side portions of the profiled body.

2. The lighting device of claim 1 , wherein said central portion includes a light-permeable material adapted to be traversed by light radiation from said at least one light radiation source, with said at least one light radiation source located at a face of said board facing said central portion.

3. The lighting device of claim 1 , wherein said profiled body includes two lateral inserts extending lengthwise of said profiled body to form said two side portions and wherein said undercuts are located between said central portion and said lateral inserts.

4. The lighting device of claim 3 , wherein said lateral inserts include a light-impermeable material.

5. The lighting device of claim 1 , wherein said central portion has a concave surface facing said light radiation source assembly.

6. The lighting device of claim 1 , wherein said profiled body and said support board are flexible.

7. The lighting device of claim 1 , further comprising a first sealing mass,

said first mass located between said central portion of the profiled body and said light radiation source assembly.

8. The lighting device of claim 1 , wherein said at least one light radiation source is an LED source.

9. A method of manufacturing a lighting device,

the lighting device comprising:

a channel-shaped elongate profiled body having a central portion and two side portions sidewise of said central portion, said profiled body with mutually opposed undercuts opening inwardly of the channel shape of the profiled body said undercuts extending lengthwise of the profiled body, and

a light radiation source assembly including an elongate support board with at least one electrically-powered light radiation source thereon, said support board having longitudinal sides extending into said undercuts, wherein the light radiation source assembly is retained by said channel-shaped profiled body

the method comprising:

providing said channel-shaped elongate body with said side portions adapted to be spread apart,

spreading apart said side portions,

arranging said light radiation source assembly with the longitudinal sides of said support board in said undercuts while said side portions are kept spread apart, and said side portions moving towards each other to capture said support board in said undercuts; and

dispensing a second sealing mass with said second mass dispensed on a face of said support board opposed said central portion of the profiled body from the one to the other of said side portions of the profiled body.

10. The method of claim 9 , further comprising dispensing at a first sealing mass with

said first mass dispensed on said central portion between said side portions.

11. The method of claim 9 , further comprising heat curing said second sealing mass.

12. The method of claim 10 , further comprising heat curing said first sealing mass.