Its called a redstone lamp. It is crafted with a glowstone in the middle and four pieces of redstone around it.
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look it up on minecraft wiki, it really depends of what light, whether it is fire, glowstone or lava.
You make Glowstone Blocks with 4x Glowstone Dust in a square formation, on your crafting grid.
Glowstone is crafted by 4 glowstone (as shown in the screenshot) lined into a 2x2 box in the bottom left of the crafting table interface.
You get Glowstone Dust from breaking blocks of Glowstone, you get 2-4 from each block.
Redstone Lamps are made using the following recipe. r = redstone dust g = glowstone block [ ][r][ ] [r][g][r] [ ][r][ ]