How long should I tan for using a stand up booth(never have been tanning)?

I have NEVER used a tanning bed/booth before. I am very fair and burn at the beach often but it turns tan after. Im really scared that I am going to burn and I have heard that stand up booths are stronger than beds so I don't have to go as long. I was thinking about starting out at 2 minutes and working my way up to prevent burning. I WILL choose a best answer. (please do not tell me about skin cancer and sunless tanning)