Luminous inverter is an average among the inverters as if you use it with luminous batteries then it provide very less backup and it takes more time to recharge than the usual. It provides less backup of 6 hours when 6 fans are on. It can run for even whole day if one uses two fans with two tube lights.
In looks its not a bad one but it also not the good one as it only has simply 3-4 designs in the UPS model and has only two types of battery for these UPS. People buy it for having a good backup but luminous is not that inverter which can not fulfill this need of the user