You can edit the file aacqform.asp in C:\Users\Public\Documents\ACP Web Data\Doc Root\ac and look for this code
Code:
nearDusk = nearestDusk(-12);                                // Wait if not yet dusk
and change the -12 to -5 or something (it will be really bright then!). If you have UAC enabled (it usually is on W7/8) then you can copy the file out to the desktop, edit it there with notepad, then copy it back to C:\Users\Public\Documents\ACP Web Data\Doc Root\ac where you'll be asked for administrator privs. Say yes.