Drawing a text with source light effect

A way to do this in Inkscape is to skew your text and add a perspective effect to a blurred copy of the text itself.

Start with your text:

Using the handles, you can skew it to give a perspective tense:

Now, duplicate the text by hitting Ctrl-D and draw a rectangle of the same size of the bounding box of the text, snapping to the text:

Convert the Rectangle to path, hit F2 and move the nodes of the rectangle in the desired position of the shadow:

Select one of the text, convert to a path and add the Path effect Perspective/envelope. Please note that once converted to a path the text cannot be edit (I should have written "its" and not "his" ... oops!).

Hit F2, move the nodes of the envelope to fit the shape of the rectangle:

Now the rectangle is useless, you can delete it or move it to a hidden layer. Please note that you didn't need the rectangle to add the path effect, it was just for explanations purposes:

Now, lower the text to be used as a shadow, give a slight blur and opacity to its fill:

Add a background and change the fill of the text:

Enjoy!