I dont know if this helps any but here is a picture of one of my plants under a 250 watt HID Lamp... This is after 4 weeks into budding... It seems to do pretty good so far but I do believe the 400 watt would do better but the 250 does fine as well... My plant is approx. 32 inches tall...
Depends on what kind of camera you have and how many kilobytes or megabytes it is using for that pic... Each camera has their own settings so i wouldnt know... unless you have a printshop or something you can use to make it smaller in kilobytes by using a jpeg file
On my camera after I take a pic I always go to where you review your pictures , get to the pic you want to downsize and hit the menu button, then scroll down to where it says resize, select that and then hit your select button again when it goes back to your picture and select small... Now that pic will be at the end of the picture list...