my grow tent issues?

ok i was wondering if a little bit of light leaking thru my grow tent will effect my flowering? also.. i have a 4x4 tent with 5 northern lights from nirvana in it.. 1000w dimmable .. set to 1000w (Mh) should i switch my bulb to (HPS) now that i switched to 12/12 a few days ago.. also im growing in fox farms ocean forest and just started using fox farms open sesamie. but i guess my main concern is the zipper letting light thru during darkness. when the lights are on and i turn off the light i see a few parts of the zipper that let light out.. so i know light is coming in.. what should i do? will it be ok?or should i relocate the tent to a darker room? i really dont want to move it.. .. also is 5 plants too much space.. here are some pics.
also i dont know if u can see but why are my tips looking like that .. only up top.. i havent used alot of nutrients .. i just started to use nutrients again.. the original nutrients i used were a time released i mixed in with the soil when i created the soil about 6.5 weeks ago. either way im ready to start flowering..



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The yellowing tips looks like nute burn.

u should be fine with the light leak with 1000w ur gonna see some small light penetration coming out but i highly doubt that all the lights in the room with your tent are that strong. i had the same concerns because i could see my 600 thru the zipper and a couple other pin point holes. i turned on every light i could in my room opened the windows got as much light in there as i could, took the plants out of the tent and crouched down in there zipped it up and there were no light leaks lol u should be fine. and im thinkin that it could be some slight nute burn but nothing serious, pull back on them for a bit n see if they recover

looks good the only problem i see might be a good problem when they grow more there going to run out of room it looks like

That FF powder should be used sparingly. Its hot as hell.

what do u mean hot as hell? please explain

bootkiller said:

what do u mean hot as hell? please explain

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its very nute heavy, it will burn ur plants easily

these look good i hope mine are this nice when they grow up. that foxfarm is a good one but the p or k i forget will yellow your leaves like that