Also this project started as RGB then added Ha.
IFN /ICL was barely visible so added 12 hours L, it turned out that the nebulosity covers all the  area around this galaxy.
Overall it is about 32hrs:
H_Alpha:  6.0 hrs
Red:  4.0 hrs
Green:  5.9 hrs
Blue:  4.7 hrs
Luminance: 12.2 hrs

Edit: at first I assumed that the nebulosity around the galaxy was IFN but NGC 1313 is the result of a merger of two galaxies that in many cases produces intracluster light (ICL).
But I found no evidence on the internet if it is the former or the latter.
It makes a lot of difference though: IFN is mainly particles of gas inside our own galaxy while ICL is made of stars that are around (even though not bound to) another galaxy.
To me still seems to be IFN: the region covered is too extended to be ICL and a the shape is not like other tidal streams. Any suggestion?

ESO gives an interesting description of the dynamics inside the galaxy:
"The galaxy bears some resemblance to some of the Milky Way's closest neighbours, the Magellanic Clouds. NGC 1313 has a barred spiral shape, with the arms emanating outwards in a loose twist from the ends of the bar.
The galaxy lies just 15 million light-years away from the Milky Way - a mere skip on cosmological scales.
The spiral arms are a hotbed of star-forming activity, with numerous young clusters of hot stars being born continuously at a staggering rate out of the dense clouds of gas and dust.Their light blasts through the surrounding gas, creating an intricately beautiful pattern of light and dark nebulosity.

But NGC 1313 is not just a pretty picture.
A mere scratch beneath the elegant surface reveals evidence of some of the most puzzling problems facing astronomers in the science of stars and galaxies. Starburst galaxies are fascinating objects to study in their own right; in neighbouring galaxies, around one quarter of all massive stars are born in these powerful engines, at rates up to a thousand times higher than in our own Milky Way Galaxy.In the majority of starbursts the upsurge in star's births is triggered when two galaxies merge, or come too close to each other.
The mutual attraction between the galaxies causes immense turmoil in the gas and dust, causing the sudden 'burst' in star formation.NGC 1313's appearance suggests it has seen troubled times: its spiral arms look lop-sided and gas globules are spread out widely around them.

Moreover, observations with ESO's 3.6-m telescope at La Silla have revealed that its 'real' centre, around which it rotates, does not coincide with the central bar. Its rotation is therefore also off kilter. Strangely enough NGC 1313 seems to be an isolated galaxy. It is not part of a group and has no neighbour, and it is not clear whether it may have swallowed a small companion in its past.
So what caused its asymmetry and stellar baby boom? An explanation based on the presence of the central bar also does not hold for NGC 1313: the majority of its star formation is actually taking place not in its bar but in dense gassy regions scattered around the arms.

By what mechanism the gas is compressed for stars to form at this staggering rate, astronomers simply aren't sure. Probing further into NGC 1313's insides reveals yet more mysteries.
In the midst of the cosmic violence of the starburst regions lie two objects that emit large amounts of highly energetic X-rays - so-called ultra-luminous X-ray sources (ULX). Astronomers suspect that they might be black holes with masses of perhaps a few hundred times the mass of our Sun each, that formed as part of a binary star system.
How such objects are created out of ordinary stars cannot be conclusively explained by current models.NGC 1313 is an altogether very intriguing target for astronomy.

This image, obtained with ESO's Very Large Telescope, demonstrates once again how the imager FORS is ideally suited to capturing the beauty and stunning complexity of galaxies by observing them in different wavelength filters, combined here to form a stunning colour image."

Source: www.eso.org