Seller1on1 via Amazon offers the Sandalwood 12-watt LED Grow Light for $23.99. Coupon code "Q3ZJ5QL2" drops it to $12.99. Plus, Prime members bag free shipping. (Non-members can spend $35 to bag free shipping; otherwise, it adds $6.87.) That's $11 off list and the lowest total price we could find. It generates minimal heat and uses a light wavelength that's better for growth.