when u say its compareable to a 75 watt incandecant does that mean it will work as well as a 75 watt incandecant??? well heres the real ?tion- i need enough wattage to supply 2 sets of 2 plants in 2 different places. i was thinking like 4 bulbs for each area but if the bulbs- 25/100 watt- are too small do i need to just add more??? and if i did have 4 of them would it be the same thing as a 400 watt hps/mh (excluding all of the little goodies that the hps/mh gives u)??? and how many lumens would i be able to get out of them??? thanks