Nice review erns. I have been eyeballing the TK70 myself. I love the light except for the choice of batteries. I have been leaning toward building a Mag with DW's triple XML.
Nice output power but I wonder how much is IR. I have purchased multiple pens from IQS before and have had hit or miss on the 532's. Personally with the 532's my track record was only about 60% of them being good and 40% being pretty much garbage. On a good note he was good to deal with and...
If memory serves me 5 of those could be run in series off 12V and be close to max brightness. Need to know the forward voltage of them to really answer the question.
I own this light and for 35 bones its hard to beat. I personally like using the 3x 18650 option myself.
$35.00 - TrustFire TR-1200 Cree Q5 WC 5-Mode 1200-Lumen White 5-LED Flashlight (2x18650/3x18650/4x16340) - 18650 Cree Flashlights