In a word, no.
Your plant needs those big fan leaves to make the energy she needs to grow her biggest and best flowers.
Less leaves = less energy = less growth.
It really is that simple!
She will still have another 4-5 weeks of flowering to go, so don't get too worried just yet.
Getting the best light you can afford will help your plants in the future grow their best buds.
More watts = more buds.
In all honesty, a 90watt light isn't going to set any records.
Hope this helps, Organoman.