No Heat Lamps
Many sauna brands are selling extremely dangerous heat lamps and calling them near infrared therapy. These are extremely dangerous and offer very little therapeutic benefits. You have to be within 2-3 inches of heat lamps to obtain any benefits, at that distance the heater will cause 1st and 2nd degree burns.
Finnmark infrared saunas are designed with LED cold light therapy coupled with Spectrum Plus heaters to create a highly effective full spectrum sauna.