Using SDSS Stripe82 data we have obtained deep radial surface brightness profiles of 7 face-on to intermediate inclined late-type spirals down to \mu _ { r ^ { \prime } } \sim 30 mag arcsec ^ { -2 } .
We do not find any evidence for a sharp cut-off of the light distribution of the disks but a smooth continuation into the stellar halos of galaxies .
Stellar halos start to affect the surface brightness profiles of the galaxies at \mu _ { r ^ { \prime } } \sim 28 mag arcsec ^ { -2 } , and at a radial distance of \gtrsim 4 - 10 inner scale-lengths .
We find that the light contribution from the stellar halo could be responsible of previous classification of surface brightness profiles as Type III in late-type galaxies .
In order to estimate the contribution of the stellar halo light to the total galaxy light , we carried out a Bulge/Disk/Stellar Halo decomposition by simoultaneously fitting all components .
The light contribution of the halo to the total galaxy light varies from \sim 1 \% to \sim 5 \% , but in case of ongoing mergers , the halo light fraction can be as high as \sim 10 \% , independently of the luminosities of the galaxies .
We have also explored the integrated ( g ^ { \prime } - r ^ { \prime } ) color of the stellar halo of our galaxies .
We find ( g ^ { \prime } - r ^ { \prime } ) colors ranging from \sim 0.4 to \sim 1.2 .
By confronting these colors with model predictions , we encounter problems to fit our very red colors onto stellar population grids with conventional IMFs .
Very red halo colors can be attributed to stellar populations dominated by very low mass stars of low to intermediate metallicity produced by bottom-heavy IMFs .