Apply the voucher on the product page for $10 off, brings it down from $33.99 to $23.99
Lightning Deal ends in 1 hr 52 Mins as of this edit
Update: 100% Claimed
Edit: The lightning Deal price was $23.99, discount minus the lightning deal rate is still ongoing. Now they're selling for $29.99 as the lightning deal allocation has all been claimed.
Another update: Changed price again to $23.99 with the use of the voucher, looks like they allocated more units to the lightning deal.