thank you for all the info, i'm looking for bulbs now on the market, Philips Sylvania etc, and i'm quite confused cause I think to do in future just 8x10 or small prints,
i would like to make this box out of wood to fit it in a small suitcase so that I can carry it out with me. Do you think a 30cm (11,8'') bulb is enough for 8x10 ?