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I can't answer your heat lamp question in good conscience because, well, personally I detest everything about them. But that's just me - others who use them regularly and successfully can help you with wattage and bulb type choices so I'll leave that in their capable hands. I have been using a heating pad cave system and won't ever go back to the way I used to do it it with a lamp of any kind.
Good luck with your hatch and chicks. And again, welcome to BYC. Hope to see you around the forum!