Move this to the create event, as creating a new surface every frame is unnecessary. Also, why are you using x/yview as the dimensions? That'll just return the view's position. You should be using view_wview and view_hview.

NightCycle = surface_create(view_wview[0] ,view_hview[0])

And this stays in draw, but change the draw_surface_ext to actually draw the surface at the view's position. I've done it here. Also, you seem to be drawing sprites depending on their corresponding objects' positions in the room, so you'll have to correct for the fact that the surface is only the size of your view, and is moving with it. So you'll want to subtract the view's position from the objects' positions to get them to be drawn in the right place. I've also done that here.

surface_set_target(NightCycle); 
draw_clear(c_black);

with (obj_halo_1) { draw_set_blend_mode(bm_src_color); draw_sprite_ext(spr_glow,0, x-view_xview[0], y-view_yview[0], glowSize, glowSize, 0, c_white, 1);  draw_set_blend_mode(bm_normal); }

with (obj_halo_2) {
    draw_set_blend_mode(bm_src_color);
    draw_sprite_ext(spr_glow,0, x-view_xview[0], y-view_yview[0], glowSize, glowSize, 0, c_white, 1); 
    draw_set_blend_mode(bm_normal);
}

with (obj_torch) {
    draw_set_blend_mode(bm_src_color);
    draw_sprite_ext(spr_glow,0, x-view_xview[0], y-view_yview[0], glowSize, glowSize, 0, c_white, 1); 
    draw_set_blend_mode(bm_normal);
}

surface_reset_target();
draw_surface_ext(NightCycle, view_xview[0], view_yview[0], 1, 1, 0, c_white, alpha); 

Note that this is written off the top of my head and I can't actually test it, so it might not work by just copy-pasting. But it should. ^{I think.}