Add another light in 5th week of flower. Is it worth it?

Hi all i am ending my fourth week of flowering this weekend. I came up with some extra funds and am going t buy a 600 watt hps light to add to the 400 watt hps 400 watt mh combo light i have. Currently it is on a light mover in my 8x4 tent. So plan is to eliminate the light mover and run both lights in my tent. Question is this late in flower is the extra light really gunna help much? I get 2 day shipping ao would have light in by start of 5th week. is it worth the hassel to rearrange the room real quick and add the light will it add to my yeild this late in the game?. I know im excited.to see this baby run with 2 lights for.full term next.run

From my experience, they need less light at the end of their life. Highest lighting demand is the when you flip to flower. same with your feed strength.
My perpetual grow runs 825 watts in a 4x8 and I cycle my plants from directly under the lights to start flower, to the perimeters as they mature. Last 2 weeks they are on the outskirts of the room.

if you want the most out of your plants surround them with lights,
if you want the most out of your lights surround them with plants.

the plants in my room exposed to the most UV/mh/hps to the end are the best performers consistently.

I was pretty much planning on adding the light. Just wanted.to see.if anyone had any good.arguments.for why it wouldnt do much at this stage in flowering. Ive read that once the buds start to ripen they really.dont need as much light. Dont know how true this is. But thats why im asking thanks for.reply

I never regretted adding more light. not sure what they need but I know they use all of the available light. proof to me was more was always better. more light in veg gave me more vegetative production and more in flower pays me back with stickier stinkier more developed buds with a higher yield. you can try it with a tent in your space for fun, same plants, some with more light and some with less.
after I got over the fact my ac was cycling in the middle of february it was easy to keep adding lol

Add it......you have nugs that need it in there.

Juat.ordered it will be adding it saturday thanks guys for.the help on the decison