I have also been wondering about this... My gym offers tanning beds with my membership, but I am so worried about going. I haven't been in a tanning bed since high school! Heavily considering finding a good place for a spray tan.
I tanned mostly outside and a few times in a tanning bed. I tan really easily and don't burn, and I don't use the face bulbs. That being said, tanning in a tanning bed (or even outside) isn't good for your skin ever and can result in skin cancer, sun spots, wrinkles, burns, etc. My dermatologist has red light beds to lay in that are supposed to help with the damage tanning beds can cause, but I'm not sure how much it works? I would buy some at home gradual tanning lotion to start using today to build a base tan and if you like the results, you'd probably like a spray tan. I'd be hesitant to start using a tanning bed less than a month before your wedding if you don't consistently use one.
I would get a spray tan. That's what I'm planning on doing. My friend got one for her wedding, she bought 3 in like a package. She looked naturally tan. I personally don't tan very well unless I work hard at it, I used to go tanning and I was tan that way. But now I know that it's bad for my skin so I tend to burn in the sun. So I'm going the spray tan route.
I'm doing a real tan and loving it! I am doing it because I want a base for my honeymoon so I don't burn. (New York skin in the Bahamas with no base, hahaha not fun) I could really care less if I was tan for the wedding, but it's just a side benefit since we are leaving for our honeymoon the day after our wedding. I honestly have gotten so many compliments about how good and natural the real tan looks! Spray tanning can go wrong and sometimes doesn't look as natural. I started tanning 3 times a week 2 months before my wedding. I started in the bed at 5 minutes and increased by one minute every week. I'm at ten minutes 3 times a week now.