yeah electricity is dangerous so do your research first and i got a mean shock ones from those led bulbs with the diffusers off. what you have to do is order these solderless holders which would make your job way easier
find a national dealer and order cree cxb1830s 3000K and 4000K 50/50.
then order a good heatsink and that heatsink will not be predrilled so you have to drill it on your own which is somewhat a task with aluminium but there are cutting oils sold which makes the process much easier.
once the holes are drilled then you have to place the diodes with the holders and wire everything in series (or parallel but i choose series) and you have to also find a corresponding driver and if not using active cooling (computer fans: which would need a seperate corresponding driver) then you’d have to drive them pretty soft maybe at 350ma which would work well with a good heavy heatsink but drilling the heatsink is the thoughest part of this process ime you never get the perfect alignment without automated drilling
oh you know what this is gonna be hard work for you i guess so i think you’d still very happy with a couple of 20w led bulbs with diffusers taken out but don’t ever touch the metal surface under the diffusers.